Answers
Answer:
Step-by-step explanation:
[tex]\frac{e^2\times e^3}{e^6}=\frac{e^{2+3}}{e^6}[/tex]
[tex]=\frac{e^5}{e^6}[/tex]
[tex]=e^{5-6}[/tex]
[tex]=e^{-1}[/tex]
Solution: (C)
Related Questions
The following inequalities represent a system.
y ≥ 5x + 2
y > −3x − 2
Which of the following graphs represents the system?
Answers
See the image linked below.
To graph system of inequalities y ≥ 5x + 2 and y > -3x - 2, draw lines for y = 5x + 2 and y = -3x - 2, then shade areas above each line. The intersection of shaded areas shows solutions to the system of inequalities.
Explanation:In order to graph the system of inequalities y ≥ 5x + 2 and y > -3x - 2 you would start by graphing each inequality as if it was an equality. For the first inequality, you would graph the line y = 5x + 2 and shade the area above the line because it's y 'greater than or equal to'. For the second inequality, you draw the line y = -3x - 2 and also shade the area above because it's y 'greater than'. The intersection of the shaded areas represents the solution to the system of inequalities. Therefore, the graph would have two shaded lines, with the common shaded area above both lines representing the solutions to the system of inequalities.
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1. What is the volume of a cube with volume 27/64 cubic units
Answers
The volume of a cube with volume 27/64 cubic units is 3/4.
What is an edge line?All edge lengths of the cube are equal. Then the volume of the cube is 3/4 units.
What is Geometry?It deals with the size of geometry, region, and density of the different forms both 2D and 3D.
The volume of the cube is 27/64 cubic units.
We know the formula of the volume is given as
Volume = a³
[tex]a^3 = \sqrt[3]{\dfrac{27}{64} }[/tex]
a = 3/4
where a is the edge length of the cube.
The edge length of the cube is 3/4 units.
Therefore, the volume of a cube with a volume of 27/64 cubic units is 3/4.
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The complete question is: What is the side of a cube with volume 27/64 cubic units?
Your company must charge $100 for a software upgrade to make a profit on its development. You must find out if your customers are willing to pay this much. A random sample of 50 customers finds that 17 would pay $100 for the upgrade. If the upgrade is to be profitable, you will need to sell it to more than 20% of your customers. Do the sample data provide good evidence that more than 20% are willing to buy at the 5% level of significance?
a) State the appropriate null and alternative hypotheses. Explain how you decided the alternative.
b) Give the z statistic and its p-value for this test.
c) Should you proceed with plans to develop and market the upgrade? Explain in context of this hypothesis test.
d) Give the 90% confidence interval for the proportion of all customers willing to pay $100.00 for the upgrade. Explain how this supports your hypothesis test conclusion.
e) You company’s overseas division also took a random sample of 50 customers and found that 38 would pay the $100.00 upgrade. Explain why or why not these two populations are different.
Answers
a. Hypotheses are: [tex]\rm H_{0}:p=0.20,H_{a}:p > 0.20[/tex]
b. Z-statistics will be 2.47 and p-value = 0.0068
c. you should proceed with plans to develop and market the upgrade.
d. Confidence interval for population proportion will be (0.23, 0.45)
e. The populations are different because they are frοm different regiοns sο prefrences οf peοple may different.
What is Probability?Probability is a mathematical concept that measures the likelihood or chance of an event occurring. It is a number between 0 and 1, where 0 indicates that the event is impossible and 1 indicates that the event is certain.
a. Hypotheses are:
[tex]\rm H_{0}:p=0.20,H_{a}:p > 0.20[/tex]
b) Here we have following information:
[tex]\rm n=50, \hat{p}=\frac{17}{50}=0.34[/tex]
Standard deviation of the proportion is:
[tex]\rm \sigma=\sqrt{\frac{p\left ( 1-p \right )}{n}}=\sqrt{\frac{0.20\left ( 1-0.20 \right )}{50}}=0.0566[/tex]
Test statistics will be:
[tex]$ \rm z=\frac{\hat{p}-p}{\sigma}=\frac{0.34-0.20}{0.0566}=2.47[/tex]
Alternative hypothesis shows that the test is right tailed so p-value of the test is
[tex]\rm p-value = P(z > 2.47) = 1 - P(z \leq 2.47)=1-0.9932=0.0068[/tex]
c. Since p-value of the test is less than 0.05 so we reject the null hypothesis at 0.05 level of significance. So based on this sample, you should proceed with plans to develop and market the upgrade.
d. For 90% confidence interval [tex]\alpha[/tex] = 0.10 so critical value of z will be[tex]\rm z_{c}=z_{\alpha/2}=1.645[/tex]
Confidence interval for population proportion will be
[tex]\rm \hat{p}\pm z_{c}\sqrt{\frac{\hat{p}\left ( 1-\hat{p} \right )}{n}}=0.34\pm 1.645\sqrt{\frac{0.34\left (1-0.34 \right )}{50}}=0.34\pm 0.11 =(0.23, 0.45)[/tex]
e. The populations are different because they are frοm different regiοns sο prefrences οf peοple may different.
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PLEASE HELP!!!!! MIDDLE SCHOOL MATH!!!!!!!!!!!!
Use the figure shown. Match each angle to the correct angle measure. Some angle measures may be used more than once or not at all.
PLEASE LOOK AT THE PICTURE BELOW!!!!! SHOW WORK!!!!!!!!
Answers
The values of all angles [tex] \angle \: GAL, \angle \: LAO, \angle CAO, \: angle \: KAC[/tex] are 71°, 90°, 90°, 90° respectively.
Given angle GAK is 19°.
It is clear that angle KAL is equal to 90°.
So,
[tex] \angle KAL = {90}^{o} [/tex]
Now,
[tex] \angle \: KAL = \angle KAG+ \angle \: GAL[/tex]
So,
[tex] \angle \: GAL = {90}^{o} - {19}^{o} \\ = {71}^{o} [/tex]
Now,
[tex] \angle \: KAO = 180°[/tex]
Now
[tex] \angle \: KAL + \angle \: LAO = {180}^{o} \\ \angle \: LAO = {180}^{o} - {90}^{o} \\ \angle \: LAO = {90}^{o} [/tex]
Again,
[tex] \angle \: CAO = {180}^{o} - \angle \: LAO \\ \angle \: CAO = {180}^{o} - {90}^{o} = {90}^{o} [/tex]
Similarly,
[tex] \angle \: KAC = \angle \: KAO - \angle \: CAO \\ \angle \: KAC = {180}^{o} - {90}^{o} \\ = {90}^{o} [/tex]
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In a school computer lab, students must use a six-digit passcode to log on to the computers.
The digits 0-9 can be used in the passcodes.
a. How many different passcodes are possible if the digits can be repeated?
b. How many different passcodes are possible if the digits cannot be repeated?
Answers
a. the total number of different passcodes possible if the digits can be repeated is 10⁶
b. the total number of different passcodes possible is 151,200.
What is probability?The possibility or chance of an event occurring is measured by probability. It is stated as a number between 0 and 1, where 0 denotes an impossibility (i.e., an event that won't happen) and 1 denotes a certainty (i.e., an event that will happen) (i.e., an event that will always occur).
a. Since there are 10 digits (0-9) that can be used for each digit in the passcode, there are 10 options for each of the six digits.
Therefore, the total number of different passcodes possible if the digits can be repeated is 10⁶, which is equal to 1,000,000.
b. If the digits cannot be repeated, there are 10 options for the first digit, 9 options for the second digit, 8 options for the third digit, and so on.
Therefore, the total number of different passcodes possible is 10x9x8x7x6x5, which is equal to 151,200.
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Mario Brothers, a game manufacturer, has a new idea for an adventure game. It can either market the game as a traditional board game or as a PC game, but not both. Consider the following cash flows of the two mutually exclusive projects. Assume the discount rate for both projects is 9 percent.
Year Board Game PC
0 −$ 1,550 −$ 3,400
1 760 2,100
2 1,300 1,640
3 280 1,150
a. What is the payback period for each project? (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.)
b. What is the NPV for each project? (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.)
c. What is the IRR for each project? (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.)
d. What is the incremental IRR? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.)
Please note this is for a Finance class for MBA program.
Answers
Can someone please help me with this problem involving Proofs of proportions or angle congruences using similarity.
Answers
By SAS congruence, triangles ΔVTW and ΔUTX are congruent.
Define SAS congruenceSAS congruence (Side-Angle-Side) is a criterion for the congruence of two triangles in Euclidean geometry. Two triangles are said to be congruent by SAS if they have two pairs of corresponding sides that are congruent, and the included angle between those sides is also congruent.
Formally, the SAS congruence theorem states that if two sides and the included angle of one triangle are congruent to the corresponding two sides and included angle of another triangle, then the triangles are congruent. In symbols, if triangle ABC is congruent to triangle DEF by SAS, we write:
AB = DE
AC = DF
∠A = ∠D
In the triangle ΔVTW and ΔUTX
TX/TW=TU/TV (given)
∠VTW=∠UTX(Vertically opposite angle)
By SAS congruence, ΔVTW≈ΔUTX
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A farmer finds there is a linear relationship between the number of bean stalks, n , she plants and the yield, y, each plant produces. When she plants 30 stalks, each plant yields 25 oz of beans. When she plants 32 stalks, each plant produces 24 oz of beans. Find a linear relationship in the form y=mn+b that gives the yield when n stalks are planted.
Answers
The linear relationship between the number of bean stalks, n, and the yield, y, is y = -0.5n + 40. This equation can be used to predict the yield of beans for any number of bean stalks planted by the farmer.
To find the linear relationship between the number of bean stalks, n, and the yield, y, we can use the two data points provided by the farmer. We know that when 30 stalks are planted, each plant yields 25 oz of beans, and when 32 stalks are planted, each plant yields 24 oz of beans.
First, we need to find the slope, m, of the line. We can use the formula:
m = (y2 - y1) / (x2 - x1)
where x1 = 30, y1 = 25, x2 = 32, and y2 = 24.
m = (24 - 25) / (32 - 30) = -0.5
Next, we need to find the y-intercept, b, of the line. We can use the point-slope form of the equation:
y - y1 = m(x - x1)
where x1 = 30 and y1 = 25.
y - 25 = -0.5(x - 30)
y - 25 = -0.5x + 15
y = -0.5x + 40
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What is 4 and 5/6 - 1 and 1/3 =
Answers
Answer:
Step-by-step explanation:
3
5.2, 5.2, 4.7, 5.4, 3.9, 3.5, 4.1, 4.2, 5.4, 4.7, 4.8, 4.2, 4.6, 5.1, 3.8, 3.9, 4.6, 5.1, 3.6, 4.6, 4.3, 3.4, 4.9, 4.2, 4.0
A manufacturer of pencils randomly selects 25 pencils and measures their length (in inches). Their data is shown. Create a frequency distribution with 6 classes and a class width of 0.4 inches. What is the shape of the frequency histogram?
The histogram is bimodal.
The histogram is roughly symmetrical.
The histogram is skewed right.
The histogram is uniform.
The histogram is skewed left.
Answers
Answer:
A) The histogram is bimodal.
Answer:
To create a frequency distribution, we first need to determine the range of the data. The smallest measurement is 3.4 inches and the largest is 5.4 inches, so the range is 5.4 - 3.4 = 2 inches. To create 6 classes with a width of 0.4 inches, we divide the range by 0.4 and round up to the nearest integer:
Number of classes = (range / class width) rounded up = 2 / 0.4 = 5
So we will use 5 classes with a width of 0.4 inches each. The classes and their corresponding frequency counts are:
Class 1: 3.4 - 3.8 | Frequency: 3
Class 2: 3.9 - 4.3 | Frequency: 8
Class 3: 4.4 - 4.8 | Frequency: 6
Class 4: 4.9 - 5.3 | Frequency: 7
Class 5: 5.4 - 5.8 | Frequency: 1
To create a histogram, we can plot the frequency counts on the y-axis and the class intervals on the x-axis. The shape of the histogram can give us information about the distribution of the data. In this case, the histogram is bimodal, meaning there are two peaks in the data. This suggests that the data may be composed of two separate subpopulations.
Let the random variable Z follow a standard normal distribution. What is the P(Z> 1.2)?
Answers
Assume Z is a regular, standard random variable. The answer is P(Z 1.2), which is written as P(Z 1.2) = (1.2) =. 8849.
What does variable mean in plain English?An variables is just a sum that can change according to the fundamental math concept. The generic letters x, y, and z are often employed in mathematical expressions and equations. Thus a variable is a sign for a numeric value that is unknown.
What does the word "variable" mean?Every feature, number, or amount that can be gauged or quantified is referred to as a variable. A statistic may also be referred to as a data item. Examples of variables include age, sex, company revenue and costs, birth country, capital expenditures, class grades, eye colour, and vehicle kind.
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The probability of Z being greater than 1.2 is 0.11507, or approximately 11.51% (rounded to two decimal places).
What do you mean by probability?Probability is a mathematical concept that expresses the possibility or chance of an event happening.
A number between 0 and 1, with 0 signifying impossibility and 1 signifying certainty, is used to symbolize it.
The likelihood of an event occurring increases as the probability approaches 1.
To find the probability P(Z > 1.2) where Z follows a standard normal distribution, we need to use the standard normal distribution table or a calculator with a normal distribution function.
Using a standard normal distribution table, we look for the probability value that corresponds to a standard normal deviate of 1.2.
The table gives us the area under the standard normal curve to the left of 1.2, which is 0.88493. Therefore, the probability of Z being greater than 1.2 is:
P(Z > 1.2) = 1 - P(Z ≤ 1.2)
= 1 - 0.88493
= 0.11507
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Find the value of � x, � y, and � z, in the rhombus below. 71 -8x+7 y+7 2z+5
Answers
I believe you meant to write the expression as follows: 71 = -8x + 7y + 7z + 5. This equation represents a relation between the values of x, y, and z in a rhombus where 71 is the sum of the diagonals of the rhombus.
How to calculate value of x,y and z for the given rhombus?
To solve for x, y, and z, we need to use additional information about the rhombus. Without any further information, we cannot determine unique values for x, y, and z.
However, we can make some observations based on the given equation:
The coefficient of x is negative (-8), which means that increasing x would decrease the value of the left-hand side of the equation. Therefore, we can conclude that x must be positive to satisfy the equation.
The coefficients of y and z are positive (7 and 7, respectively), which means that increasing y and/or z would increase the value of the left-hand side of the equation. Therefore, we can conclude that y and z must be non-negative to satisfy the equation.
With these observations in mind, we can come up with multiple solutions for x, y, and z that satisfy the given equation. Here are a few examples:
If we let x = 0, y = 11, and z = 9, then the equation is satisfied:
71 = -8(0) + 7(11) + 7(9) + 5
71 = 77
If we let x = 2, y = 10, and z = 8, then the equation is also satisfied:
71 = -8(2) + 7(10) + 7(8) + 5
71 = 71
Therefore, we cannot determine a unique solution for x, y, and z based on the given equation alone.
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y varies directly as the square root of z. If y = 36, then z = 36.
Answers
Equation: [tex]y=k\sqrt{z}[/tex].
Value of the constant of proportionality (k): 6.
Step-by-step explanation:1. Write the equation using variables.So if y varies directly as the square root of z, there's a constant coefficient (k) multiplying the square root of z. Why? Because taking the square root of z will reduce it's value, then a number (k) must be multiplying it to make it match the value of y.
So:
[tex]y=k\sqrt{z}[/tex]
2. Substitute the equation with the given values.[tex]y = 36;\\ \\z = 36;\\ \\(36)=k\sqrt{(36)}\\ \\[/tex]
3. Divide both sides of the equation by [tex]\sqrt{36}[/tex] to calculate the value of k.[tex]\frac{36}{\sqrt{(36)}} =\frac{k\sqrt{(36)}\\ \\}{\sqrt{(36)}} \\ \\\frac{36}{6} =k\\ \\k=6[/tex]
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[tex]\blue{\huge {\mathrm{SOLVING \; EQUATIONS}}}[/tex]
[tex]{===========================================}[/tex]
[tex]{\underline{\huge \mathbb{Q} {\large \mathrm {UESTION : }}}}[/tex]
y varies directly as the square root of z. If y = 36, then z = 36.[tex]{===========================================}[/tex]
[tex] {\underline{\huge \mathbb{A} {\large \mathrm {NSWER : }}}} [/tex]
[tex]\qquad\qquad\begin{aligned}\bold{y = k\sqrt{z}}\\\\\bold{\:k = 6\:\:\:}\end{aligned}[/tex]
*Please read and understand my solution. Don't just rely on my direct answer*
[tex]{===========================================}[/tex]
[tex] {\underline{\huge \mathbb{S} {\large \mathrm {OLUTION : }}}} [/tex]
From the given information, we are given that:
[tex]\sf \red{y} = \red{36}[/tex][tex]\sf \blue{z} = \blue{36}[/tex]Since y varies directly as the square root of z, we can write this as an equation:
[tex]\sf \red{y} = k\sqrt{\blue{z}}[/tex]where:
k is the constant of proportionality.Substitute the given values into the equation and solve for k:
[tex]\qquad\qquad\begin{aligned}\sf \red{y} &=\sf k\sqrt{\blue{z}}\\\sf \red{36} &=\sf k\sqrt{\blue{36}}\\\sf \dfrac{\red{36}}{\sqrt{\blue{36}}} &=\sf \dfrac{k \cancel{\sqrt{\blue{36}}}}{ \cancel{\sqrt{\blue{36}}}}\\\sf \dfrac{\red{36}}{\blue{6}}&=\sf k\\\sf 6& =\sf k\\\sf \bold{\:k}& = \bold{6}\:\end{aligned}[/tex]
[tex]{===========================================}[/tex]
Bear in Mind!Equations are mathematical statements that show that two quantities are equal. They typically contain an equal sign (=) and one or more variables. Equations are used to express relationships between quantities and to solve problems in various fields of science, engineering, and mathematics.
Example equations include:
[tex]\sf -4t^2 - 16t = -8[/tex][tex]\sf -2x + 5 = 13[/tex][tex]\sf -\dfrac{y}{7} = 3[/tex]To solve an equation, we want to determine the value of the variable(s) that make the equation true.
There are different techniques to solve equations, but some common steps include:
1. Simplify both sides of the equation by combining like terms and using the order of operations if necessary.
2. Isolate the variable on one side of the equation by undoing any operations that were performed on it.
For example, if the variable is multiplied by a number, divide both sides of the equation by that number. If the variable is added to a number, subtract that number from both sides of the equation.3. Check the solution by plugging it back into the original equation to see if it makes the equation true.
[tex]{===========================================}[/tex]
[tex]- \large\sf\copyright \: \large\tt{AriesLaveau}\large\qquad\qquad\qquad\tt 04/01/2023[/tex]
The volume of air in a persons lungs can be molded with a periodic function the graph below represents the volume of air ,in mL, in a persons long overtime measured in seconds, t.what is the amplitude and what does it represent in this context?
Answers
Amplitude of attached graph is 800 and here amplitude explains the maximum change in volume as compare to average volume.
Let us consider two point on the attached graph.
Lowest point as ( 0.5, 1000 )
Highest point as ( 2.5 , 2600 )
In a periodic function the volume of air in a person's lungs over time,
The amplitude is the distance between the maximum value of the function and its average value.
It is represented by y-coordinate.
Amplitude = ( 2600 - 1000 ) / 2
= 1600 / 2
= 800
In the context of the volume of air in a person's lungs,
The amplitude represents the maximum change in the volume of air from the average volume.
This is an important measure of lung function.
As it indicates how much air a person can take in and expel from their lungs with each breath.
The higher the amplitude, the greater the lung capacity and respiratory function of the person.
Therefore, the amplitude in the graph is equal to 800 and it represents the maximum variation in the volume of air from the average volume.
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The above question is incomplete, the complete question is:
The volume of air in a persons lungs can be molded with a periodic function the graph below represents the volume of air ,in mL, in a persons long overtime measured in seconds, t. What is the amplitude and what does it represent in this context?
Graph is attached.
. Ten weeks of data on the Commodity Futures Index are 7.35, 7.40, 7.55, 7.56, 7.60, 7.52,
7.52, 7.70, 7.62, and 7.55.
a. Construct a time series plot. What type of pattern exists in the data?
b. Use trial and error to find a value of the exponential smoothing coefficient that results in a relatively small MSE.
Answers
By iterating through different alpha values, you can identify the optimal alpha for this data set that results in the smallest MSE.
How to solvea. To construct a time series plot, you would typically use software like Excel or programming languages like Python or R.
However, I can describe the general trend based on the given data points.
Week 1: 7.35
Week 2: 7.40
Week 3: 7.55
Week 4: 7.56
Week 5: 7.60
Week 6: 7.52
Week 7: 7.52
Week 8: 7.70
Week 9: 7.62
Week 10: 7.55
Based on the data, there seems to be a slight overall upward trend in the Commodity Futures Index over the ten weeks, but there are also small fluctuations up and down throughout the period.
b. To find the best exponential smoothing coefficient (alpha) using the trial and error method, you would typically use software or programming languages to calculate the Mean Squared Error (MSE) for each alpha value.
Choose an initial value for alpha (e.g., 0.1).
Apply the exponential smoothing formula to the data series: St = α * Xt + (1 - α) * St-1, where St is the smoothed value at time t, α is the smoothing coefficient, Xt is the observed value at time t, and St-1 is the smoothed value at time t-1.
Calculate the forecast errors (Et) as the difference between the observed value and the smoothed value for each time period: Et = Xt - St-1.
Compute the Mean Squared Error (MSE) by taking the average of the squared forecast errors.
Repeat steps 2-4 with different values of alpha (e.g., 0.2, 0.3, 0.4, etc.) until you find the alpha value that minimizes the MSE.
By iterating through different alpha values, you can identify the optimal alpha for this data set that results in the smallest MSE.
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Find the distance between the point (2,1) and the line 3x- 4y+15=0
Answers
Answer:
Step-by-step explanation:
3
x
−
4
y
+
15
=
0
.
y
=
3
4
x
−
1
2
Correct answers 5.4
Distance from point (2,3) to the line 3x+4y+9=0
=>r=
3
2
+4
2
∣3(2)+4(3)+9∣
=>r=
9+16
∣16+12+9∣
=>r=
5
27
=>r=5.4
translate the triangle 3 to the right and 2 down
Answers
According to the assumption the translated triangle would have vertices at (4,0), (6,2), and (5,-1).
Given,
To translate a triangle 3 units to the right and 2 units down, we would take each point of the original triangle and add 3 to the x-coordinate and subtract 2 from the y-coordinate.
For example, if the original triangle has vertices at (1,2), (3,4), and (2,1), the translated triangle would have vertices at:
(1+3, 2-2) = (4,0)
(3+3, 4-2) = (6,2)
(2+3, 1-2) = (5,-1)
So, the translated triangle would have vertices at (4,0), (6,2), and (5,-1).
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AOC and BOD are diameters of a circle prove that ABD and triangle DCA are congruent by RHS
Answers
Statement-Reason Proof:
If the circle has center O, then:
1.) BD = CA [Definition of Diameters of a Circle]
2.) Angle BAD = Angle CDA [Angle of Semicircle are Right Angles (90°)]
3.) AD = AD [Reflexive Property]
4.) Triangle DCA ≅ Triangle ABD [RHS Congruency Rule]
HELP PLSSSSSSSSSSSSSSSSSS NEED THIS ASAP
Answers
Answer:
Step-by-step explanation:
First you have to find out how many red were in the original 27 marbles.
If there were 7 Black and 4 Yellow - this is 11 so 27 - 11 = 16 RED.
Removing 3 Black - changes the the can to 24 marbles.
4 Black - 4 Yellow and 16 Red.
So probability the random pick is red after the removal of 3 Black is
16 out of 24. [tex]\frac{16}{24}[/tex]
This reduces to 2/3.
Choice (K)
Answer:
Step-by-step explanation:
There are 27 marbles which include 7 black marbles
4 yellow marbles
Therefore, the number of red marbles=27-(7+4) marbles
=16 red marbles
When 3 black marbles are removed from the can, the total number of marbles become 24, which includes the 4 black marbles,4 yellow marbles and 16 red marbles.
So, the probability of the picking of a random red marble from the can after removing the black marbles = 16÷24
This when reduced gives the result 2÷3.
Hence, the answer is option K which means the probability that it was red is 2/3.
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teri's car holds 17.4 gallons og gas. if she can drive 478.5 miles ona full tank of gas, how many miles can she per gallons
Answers
Teri can drive approximately 27.47 miles per gallon of gas.
To find how many miles per gallon Teri can drive, we need to divide the total distance she can travel on a full tank of gas by the amount of gas she needs to fill the tank. This gives us the average number of miles she can travel on one gallon of gas.
Teri's car can hold 17.4 gallons of gas.
Teri can drive 478.5 miles on a full tank of gas.
Mathematically, we can represent this as:
Miles per gallon = Total distance traveled ÷ Amount of gas used
Plugging in the values we have:
Miles per gallon = [tex]\frac{478.4 miles}{17.4 gallons}[/tex]
Performing the division:
Miles per gallon = 27.47126437
Rounding to two decimal places, we get:
Miles per gallon ≈ 27.47
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Which of these quadratic functions is
represented by the graph below? (Graph is provided in the attachment file)
Answers
The function for the graph of the parabola given in the picture attached will be Option (H). f(x) = x² - 6x -1
What is the equation of the parabola?
The equation of a parabola depends on its vertex and focus. There are two possible orientations for a parabola, depending on whether it opens upward or downward (in the case of a vertical axis of symmetry) or leftward or rightward (in the case of a horizontal axis of symmetry).
Equation of a parabola in vertex form:
Equation of a parabola in vertex form is given by,
y = a(x - h)² + k
Here, (h, k) is the vertex of the parabola
Given in the graph,
Vertex of the parabola → (0, 2)
Parabola passes through the origin (4, 8).
The equation of the graph with vertex (0, 2) will be,
y = a(x - 0)² + 2
Since, the parabola passes through (4, 8),
8 = a(4 - 0)² + 2
8 = 16a + 2
a = 6/16
Substitute the value of 'a' in the equation of the parabola,
y = a(x - 0)² + 2
y = 6/16(x - 0)² + 2
y = 2/8(x - 0)² + 2
y = x² - 6x + 9 - 9
y = x² - 6x -1
Hence, the function representing the graph will be f(x) = x² - 6x -1
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A circle is inscribed in a regular hexagon with side length 2 units.
What is the exact area of the circle?
Answers
The exact area of the inscribed circle is 12π square units.
What is circle?A circle is a geometric shape consisting of all the points in a plane that are equidistant from a given point called the center of the circle. The distance between the center and any point on the circle is called the radius of the circle.
According to question:The radius of the inscribed circle is also the distance from the center of the hexagon to each of its sides. To find this distance, we can divide the hexagon into six equilateral triangles, each with side length 2 units. The height of each triangle is √3 times the side length, or 2√3 units. The distance from the center of the hexagon to each side is equal to this height, or 2√3 units.
Therefore, the radius of the inscribed circle is 2√3 units. The area of the circle is given by the formula A = πr², where r is the radius. Substituting in the value of the radius, we get:
A = π(2√3)² = 12π
So the exact area of the inscribed circle is 12π square units.
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Prahar wants to bake homemade apple pies for the school bake sale. The recipe for the filling of a homemade apple pie that serves 8 consists of the following:
three fourths cup sugar
three fifths teaspoon cinnamon
one eighth teaspoon ground nutmeg
one fourth teaspoon salt
Prahar would like to serve 22 people. Choose one of the ingredients from the recipe and determine the amount he would need for a serving of this size. Set up the proportion and show all necessary work using fractions or decimals.
Answers
Prahar would need approximately [tex]2.0625[/tex] cups of sugar to make apple pies that serve [tex]22[/tex] people. We can round this up to [tex]2 1/8[/tex] cups of sugar for practical purposes.
What is the use of proportion?To determine the amount of one of the ingredients needed to make an apple pie that serves [tex]22[/tex] people, we can set up a proportion comparing the number of servings:
Number of servings of the original recipe: [tex]8[/tex]
Number of servings needed: [tex]22[/tex]
Let's choose sugar as the ingredient to calculate:
Original amount of sugar for 8 servings: [tex]3/4[/tex] cup
Unknown amount of sugar for [tex]22[/tex] servings: x
We can set up the proportion as follows:
[tex]8/22 = 3/4x[/tex]
To solve for x, we can cross-multiply:
[tex]8x = 22 \times 3/4[/tex]
[tex]8x = 16.5[/tex]
[tex]x = 16.5/8[/tex]
[tex]x = 2.0625[/tex]
Therefore, Prahar would need approximately [tex]2.0625[/tex] cups of sugar to make apple pies that serve [tex]22[/tex] people. We can round this up to [tex]2 1/8[/tex] cups of sugar for practical purposes.
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A group of people were asked if they had run a red light in the last year. 348 responded "yes", and 400 responded "no".
Answers
The probability of people who run red lights is
=0.465
Probability is the measure of the likelihood or chance that an event will occur.
Probability = Possible outcome of an event ÷ Total outcome
Total number of people asked if they had run a red light = number of people that responded 'yes' + number of people that responded 'no'
Total outcome = 348+400
Total outcome = 748
Possible outcome = number of people that responded yes = 394
The probability that if a person is chosen at random, they have run a red light in the last year will be
[tex]=\frac{348}{748}\\\\=0.465[/tex]
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CRA CDs Inc. wants the mean lengths of the “cuts” on a CD to be 148 seconds (2 minutes and 28 seconds). This will allow the disk jockeys to have plenty of time for commercials within each 10-minute segment. Assume the distribution of the length of the cuts follows a normal distribution with a standard deviation of eight seconds. Suppose that we select a sample of 26 cuts from various CDs sold by CRA CDs Inc. Use Appendix B.1 for the z values. a. What can we say about the shape of the distribution of the sample mean? Shape of the distribution is (Click to select) b. What is the standard error of the mean? (Round the final answer to 2 decimal places.) Standard error of the mean seconds. c. What percentage of the sample means will be greater than 152 seconds? (Round the z values to 2 decimal places and the final answers to 2 decimal places.) Percentage % d. What percentage of the sample means will be greater than 144 seconds? (Round the z values to 2 decimal places and the final answers to 2 decimal places.) Percentage % e. What percentage of the sample means will be greater than 144 but less than 152 seconds? (Round the z values to 2 decimal places and the final answers to 2 decimal places.) Percentage %
Answers
a. The shape of the distribution of the sample mean will be approximately normal, according to the Central Limit Theorem.
b. The standard error of the mean is given by:
SE = σ / sqrt(n)
where σ is the population standard deviation (8 seconds), and n is the sample size (26). Substituting the given values, we get:
SE = 8 / sqrt(26) ≈ 1.57 seconds
Rounded to 2 decimal places, the standard error of the mean is 1.57 seconds.
c. To find the percentage of sample means that will be greater than 152 seconds, we need to calculate the z-score corresponding to a sample mean of 152 seconds:
z = (x - μ) / (σ / sqrt(n))
where x is the sample mean (152 seconds), μ is the population mean (148 seconds), σ is the population standard deviation (8 seconds), and n is the sample size (26).
Substituting the given values, we get:
z = (152 - 148) / (8 / sqrt(26)) ≈ 1.98
Using Appendix B.1, we find that the area to the right of a z-score of 1.98 is 0.0242, or 2.42%. Therefore, approximately 2.42% of the sample means will be greater than 152 seconds.
d. To find the percentage of sample means that will be greater than 144 seconds, we need to calculate the z-score corresponding to a sample mean of 144 seconds:
z = (x - μ) / (σ / sqrt(n))
where x is the sample mean (144 seconds), μ is the population mean (148 seconds), σ is the population standard deviation (8 seconds), and n is the sample size (26).
Substituting the given values, we get:
z = (144 - 148) / (8 / sqrt(26)) ≈ -1.98
Using Appendix B.1, we find that the area to the right of a z-score of -1.98 is also 0.0242, or 2.42%. Therefore, approximately 2.42% of the sample means will be less than 144 seconds.
e. To find the percentage of sample means that will be greater than 144 but less than 152 seconds, we need to find the area between the z-scores corresponding to sample means of 144 and 152 seconds.
The z-score corresponding to a sample mean of 144 seconds is:
z1 = (144 - 148) / (8 / sqrt(26)) ≈ -1.98
The z-score corresponding to a sample mean of 152 seconds is:
z2 = (152 - 148) / (8 / sqrt(26)) ≈ 1.98
Using Appendix B.1, we find that the area to the right of a z-score of -1.98 is 0.0242, and the area to the right of a z-score of 1.98 is 0.0242. Therefore, the area between these two z-scores is:
0.5 - 0.0242 - 0.0242 = 0.4516
Multiplying by 100, we get that approximately 45.16% of the sample means will be greater than 144 but less than 152 seconds.
An element with a mass of 540 grams decays by 12.8% per minute. To the nearest tenth of a minute, how long will it be until there are 110 grams of the element remaining?
Answers
Therefore, to the nearest tenth of a minute, it will be about 9.4 minutes until there are 110 grams of the element remaining.
What is initial amount?"Initial amount" usually refers to the starting quantity or value of something, such as money, an investment, or a substance. It is the amount or quantity that exists at the beginning of a particular time period or situation. For example, if you invest $1,000 in a savings account, the initial amount is $1,000. Similarly, if you are given 10 liters of water, the initial amount of water is 10 liters.
We can use the exponential decay formula to solve this problem:
[tex]N(t) = N₀ * e^{(-kt)}[/tex]
where N(t) is the amount of the element remaining at time t, N₀ is the initial amount of the element, k is the decay constant (which is equal to ln (1 - 0.128) = -0.142), and e is the base of the natural logarithm.
We can plug in the given values and solve for the time t when the remaining amount N(t) is equal to 110 grams:
[tex]110 = 540 * e^{(-0.142t)}[/tex]
Dividing both sides by 540, we get:
[tex]0.2037 = e^{(-0.142t)}[/tex]
Taking the natural logarithm of both sides, we get:
[tex]ln(0.2037) = -0.142t[/tex]
Solving for t, we get:
t = ln (0.2037) / (-0.142) ≈ 9.4 minutes
Therefore, to the nearest tenth of a minute, it will be about 9.4 minutes until there are 110 grams of the element remaining.
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34kg of apples cost $374. how many kilograms of apples can you get with $220
Answers
Answer:
20 kilograms.
Step-by-step explanation:
First, we need to find the cost per kilogram.
We can do this by dividing 374 by 34.
That gives us 11. So, our cost per kilogram is $11.
Next, to find how many kilograms we can get with $220 dollars, we need to divide 220 by 11.
That leaves us with a final answer of 20 kilograms.
example of improper sampling in day to day life?
Answers
Answer: Sampling is very often used in our daily life. For example, while purchasing fruits from a shop, we usually examine a few to assess the quality. A doctor examines a few drops of blood as a sample and draws a conclusion about the blood constitution of the whole body.
The _______________ is a collection of people and companies where shares in the various companies are bought, sold, and traded.
A. Life Insurance Company
B. Savings Institution
C. Stock Market
D. Bonds
Answers
Answer:
C) Stock Market.
Brainly wants me to put at least 20 characters and since I only provided the answer choice and was too lazy to do an explanation I am putting this here.
Answer:
C) Stock Market.
Step-by-step explanation:
The term stock market refers to several exchanges in which shares of publicly held companies are bought and sold.
Emery bought 3 cans of beans that had a total weight of 2.4 pounds. If each can of beans weighed the same amount, which model correctly illustrates the relationship? Check all that apply.
Answers
The equation will be y = 2.4x. Thus, 2nd option is correct.
What is an Equations?Equations are mathematical statements with two algebraic expressions on either side of an equals (=) sign. It illustrates the equality between the expressions written on the left and right sides. To determine the value of a variable representing an unknown quantity, equations can be solved. A statement is not an equation if there is no "equal to" symbol in it. It will be regarded as an expression.
We can use a proportion to model the relationship between the number of cans and the total weight. Since we have three cans, we can represent the weight of each can as x, and the total weight as 2.4 pounds:
3x = 2.4
Solving for x, we get:
x = 0.8
Therefore, each can weighs 0.8 pounds.
Hence the equation will be y = 2.4x. Thus, 2nd option is correct.
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Emery bought 3 cans of beans that had a total weight of 2.4 pounds. If each can of beans weighed the same amount, which model correctly illustrates the relationship? Check all that apply.
y = 0.8x
y = 2.4x
y = 3x
y = x/2.4