The vertices of the ellipse are (-4,2) and (4,2), since these points lie on the major axis of the ellipse which is horizontal.
Two of the focuses given in the issue, (−4,2) and (4,2), are both situated on a similar even line. This implies that the significant hub of the oval should be level. Two different focuses given in the issue, (2,2) and (- 9,2), are likewise situated on this level line. Thusly, the focal point of the oval is the midpoint between the focuses (- 4,2) and (4,2), which is (0,2).
The other two focuses given in the issue, (−5,5) and (−5,−1), are situated on an upward line that goes through the focal point of the oval. This implies that the minor pivot of the oval should be vertical.
The vertices of the oval are the places where the significant hub meets the circle. Since the significant hub goes through the focuses (−4,2) and (4,2), the vertices of the oval are (- 4,2) and (4,2).
In this way, the vertices of the oval are (- 4,2) and (4,2).
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The city of London charges $1,800 in taxes per year for a 2,500 square metre farm. How much would Maple Farms have to pay in taxes, it they had a 15,200 square metres farm in the same area?
Maple Farms needs to pay $10,944 in taxes for a land measuring
15,200 m².
Here we are given that Maple Farms owns an area of 15,200 m²
Now for every 2500 m² area of farm land, the tax needed to be paid in the city of London is $1,800. We are required to find tax to be paid for 15,200 m² of farmland.
First, we need to find the tax to be paid for every 1 m² of farmland.
This will be
$ 1800/ 2500
= $ 0.72
Hence for a land of area 15,200 m²
The amount to be paid is
$ 15,200 X 0.72
= $10,944
Hence Maple Farms needs to pay $10,944 in taxes
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help asap assignment closes soon!
According to the information, the approximation and exact values are V = 65.45 cubic cm (approximation to the nearest hundredth), Exact value: V = (4/3)π(2.5)^3 = 65.44984695 cubic cm (exact).
How to calculate the volume of the sphere?The formula for the volume of a sphere is:
V = (4/3)πr^3
Since the diameter of the sphere is given as 5 cm, the radius is half of that, which is:
r = d/2 = 5/2 = 2.5 cmSubstituting this value into the formula, we get:
V = (4/3)π(2.5)^3V = (4/3)π(15.625)V = 65.45 cubic cm (approximation to the nearest hundredth)Exact value: V = (4/3)π(2.5)^3 = 65.44984695 cubic cm (exact)Learn more about volume in: https://brainly.com/question/1578538
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The expression 1.01x1.005 gives the amount of money, in thousands of dollars, in Carter's savings account t years after he opens it.
the expression 1.01 represents the interest rate applied to the initial amount of 1.005 thousand dollars
In the given expression 1.01 × [tex]1.005^{t}[/tex], the value 1.01 represents the annual interest rate on Carter's savings account. To understand this, let's break down the expression: "1.005" represents the initial amount of money in Carter's savings account, in thousands of dollars. "t" represents the number of years that have passed since he opened the account, and t is the variable that represents this time. "1.01" represents the interest rate on Carter's savings account. The interest rate of 1.01 means that for every 1 dollar in Carter's savings account, he earns an additional 1.01 cents of interest after one year. Therefore, the expression 1.01 ×[tex]1.005^{t}[/tex]represents the amount of money in thousands of dollars that Carter has in his savings account after t years, with 1.01 being the interest rate applied to the initial amount of 1.005 thousand dollars
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Complete Question
The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in Carter's savings account (t) years after he opens it. What does 1.01 represent in this expression?
if a typist is able to type 5 pages in 10 minutes, then by your calculations, how many hours will it take the typist to type 60 pages?
Answer:
2 hours
Step-by-step explanation:
[tex]\frac{5}{10}[/tex] = [tex]\frac{60}{x}[/tex] Cross multiply and solve for x
5x = 600 Divide both sides by 5
x = 120
This is 120 minutes. 120 minutes is equal to 2 hours.
Helping in the name of Jesus.
Answer:
2 hours
Step-by-step explanation:
If 5 pages in 10 minutes and 60 pages than 60/5, which is 12. 12*10=120 minutes. 120 minutes is equivalent to 2 hours.
7. What is the measure of ZAOB?
The measure of ∠AOB is 80°.
Describe Angles?In geometry, an angle is a figure formed by two rays, or half-lines, that originate from a common endpoint, which is called the vertex. The rays can be thought of as emanating from the vertex and extending infinitely in opposite directions.
The measure of an angle is typically given in degrees, where a full circle is 360 degrees. Angles can be classified according to their size:
An acute angle is less than 90 degrees.
A right angle measures exactly 90 degrees.
An obtuse angle is greater than 90 degrees but less than 180 degrees.
A straight angle measures exactly 180 degrees.
A reflex angle is greater than 180 degrees but less than 360 degrees.
A full angle measures exactly 360 degrees.
In a parallelogram, opposite angles are equal, so we have:
∠OAD = ∠OCB = a2 + b2 (1)
∠OAB = ∠ODC = a1 + d1 (2)
∠OAB + ∠OAD = ∠BOC = 180° (3)
∠OAD + ∠BOC = ∠AOB + ∠ODC = 180° (4)
From (1), (2), and (3), we have:
∠AOB = 180° - (a1 + b2 + a2 + d1)
= 180° - (a1 + a2 + b1 + b2 + c1 + d1 + d2)
= 180° - ∠ABD - ∠BCD
Since ABCD is a parallelogram, we have ∠ABD = ∠BCD. Therefore,
∠AOB = 180° - 2∠ABD
Let x be the measure of angle ABD. Then we have:
∠ABD + ∠BCD = 180°
x + (d1 + d2) = 180° (5)
In triangle ADO, we have:
∠ADO + ∠ODA + ∠OAD = 180°
d2 + x + a2 = 180° (6)
From (5) and (6), we get:
d1 + d2 + a2 + x = 180°
Substituting this expression into (3), we obtain:
∠AOB = 180° - 2(d1 + d2 + a2 + x)
= 80°
Therefore, the answer is (d) 80°.
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The measure of ∠AOB is 80°. The required answer for the given question is option (d). 80°.
Describe Angles?An angle is a figure in geometry made up of two rays, or half-lines, that start from a single endpoint known as the vertex. You can imagine the
rays coming from the vertex and continuing in opposing directions indefinitely.
A whole circle has 360 degrees, hence an angle is commonly measured in degrees. Angles can be grouped based on their size:
Acute angle is one that is less than 90 degrees.
A right angle has a 90 degree angle.
Obtuse angles are those that are greater than 90 degrees and less than 180 degrees.
A straight angle has a 180 degree length.
Greater than 180 degrees and less than 360 degrees is a reflex angle.
360 degrees makes up a whole angle.
Since opposite angles in a parallelogram are equal, we have:
∠OAD = ∠OCB = [tex]a_2+b_2[/tex] (1)
∠OAB = ∠ODC = [tex]a_1+d_1[/tex] (2)
∠OAB + ∠OAD = ∠BOC = 180° (3)
∠OAD + ∠BOC = ∠AOB + ∠ODC = 180° (4)
From (1), (2), and (3), we have:
∠AOB = 180° - [tex](a_1 + b_2 + a_2 + d_1)[/tex]
= 180° - [tex](a_1 + a_2 + b_1 + b_2 + c_1 + d_1 + d_2)[/tex]
= 180° - ∠ABD - ∠BCD
Due to the parallelogram that is ABCD, we have ∠ABD = ∠BCD.
∠AOB = 180° - 2∠ABD
Let x be the measure of angle ABD. Then we have:
∠ABD + ∠BCD = 180°
x + [tex](d_1 + d_2)[/tex] = 180° (5)
In triangle ADO, we have:
∠ADO + ∠ODA + ∠OAD = 180°
[tex]d_2[/tex] + x + [tex]a_2[/tex] = 180° (6)
From (5) and (6), we get:
[tex]d_1 + d_2 + a_2[/tex] + x = 180°
Substituting this expression into (3), we obtain:
∠AOB = 180° - 2[tex](d_1 + d_2 + a_2 + x)[/tex]
= 80°
Therefore, the answer is (d) 80°.
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A solid metal sphere of radius 9 is melted and transformed into three identical spheres. What is the ratio of the surface area of one of these spheres to the surface area of the original sphere?
Ratio of surface area of one of the new spheres to surface area of original sphere is [tex]$\frac{1}{3}\sqrt[3]{3}$[/tex] when a solid metal sphere of radius 9 is melted and transformed into three identical spheres.
How to calculate the ratio of the surface area of one of these spheres to the surface area of the original sphere?
The original sphere has radius 9, so its surface area is:
[tex]$A_1 = 4\pi(9^2) = 324\pi$[/tex]
When the sphere is melted down and formed into three identical spheres, each sphere will have one-third of the original mass and one-third of the original volume. Since the spheres are identical, they will each have the same radius.
Let r be the radius of one of the new spheres. Then the volume of each new sphere is:
[tex]$V_2 = \frac{4}{3}\pi(r^3)$[/tex]
Since the original sphere has been split into three identical spheres, the total volume is:
[tex]$V_{total} = 3(\frac{4}{3}\pi(r^3)) = 4\pi(r^3)$[/tex]
Since the original sphere and the three new spheres have the same total volume, we can set their volumes equal to each other:
[tex]$4\pi(9^3) = 4\pi(r^3)$[/tex]
Simplifying, we get:
[tex]$r = \frac{9}{\sqrt[3]{3}}$[/tex]
Now we can find the surface area of one of the new spheres:
[tex]$A_2 = 4\pi(r^2) = 4\pi(\frac{9}{\sqrt[3]{3}})^2 = \frac{108\pi}{\sqrt[3]{3}}$[/tex]
Finally, we can find the ratio of the surface area of one of the new spheres to the surface area of the original sphere:
[tex]$\frac{A_2}{A_1} = \frac{\frac{108\pi}{\sqrt[3]{3}}}{324\pi} = \frac{1}{3}\sqrt[3]{3}$[/tex]
Therefore, the ratio of the surface area of one of the new spheres to the surface area of the original sphere is [tex]$\frac{1}{3}\sqrt[3]{3}$[/tex].
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please help rewarding brainliest
Answer: f(x)
Step-by-step explanation: It goes from the lowest elevation to the highest.
If f(x) = x³, what is the equation of the graphed function?
Required equation of graphed function is y=x³.
What is equation?
An equation is a statement that shows the equality between two expressions, which may contain one or more variables. Equations are typically written using mathematical symbols, such as "equals" (=), plus (+), minus (-), multiplication (*), division (/), exponentiation (^), and parentheses ().
For example, the equation "2x + 5 = 11" shows that the expression "2x + 5" is equal to the expression "11" when the value of the variable x is 3.
Equations are fundamental in mathematics and have numerous applications in various fields, including physics, engineering, economics, and computer science. They are used to model real-world phenomena, make predictions, solve problems, and develop theories.
The graph of the function f(x) = x³ is a curve that passes through the origin and has a shape similar to that of a "S" curve. The equation of the graphed function is y = x³, where y represents the value of the function at any given x. This means that for any value of x, the corresponding value of y on the graph is given by y = x³.
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Can someone help me with this please
The value of m arc Q I=94°
What is the arc?a continuous section of an arc, which is a curved line that forms a portion of a circle of circumference. a blazing passage of electricity electrodes through between a gap in a circuit o that called a curved rout
What is properties of arc ?arcs have two properties is the easiest way . They have length as a component of circumference and, based on the associated central angle, they also have a detectable curvature.
Given arc m Y S=180°,m∠Q B I=137°
We know that,
[tex]mQBI =\frac{1}{2} (m arcYS+marcQI)\\137=\frac{1}{2} (180+marcQI)\\274=180+marcQI\\marcQI=274-180\\marcQI=94[/tex]
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The table shows the monthly precipitation $P$ (in inches) for Bismarck, North Dakota, where $t=1$ represents January. Write a model that gives $P$ as a function of $t$ and interpret the period of its graph. Round each value in the equation to the nearest thousandth
The model P = at + b, which can interpret the period of its graph.
What is an arithmetic progression?
An arithmetic progression is a sequence of numbers where each term is obtained by adding a fixed number to the previous term. In other words, if we have a sequence a1, a2, a3, that is arithmetic, then a2 - a1 = a3 - a2 = d, where d is a common difference.
To write a model that gives P as a function of t, we can use the general form of an arithmetic sequence:
P= at + b
where a is the common difference and b is the initial value of the sequence. To find a and b, we can use the information given in the table. For example, we can use the first two data points to get:
P1 = a(1)+b
P2 = a(2)+b
Subtracting the first equation from the second gives:
P2 - P1 = a(2-1)
or
a = P2 - P1
Once we have a, we can use either of the equations above to solve for b. For example, using the first equation, we get:
b = P1 − a(1)
Now that we have the model P = at + b, we can interpret the period of its graph.
The period of an arithmetic function is the smallest positive value of k such that f(x) = f(x + k) for all x. In this case, the function is linear, so it has no periodic behavior.
hence, the model P = at + b, which can interpret the period of its graph.
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The graph showing the total number of prisoners in state and federal prisons for the years 1960 through 2009 is shown in the figure. There were 204,608 prisoners in
1960 and 1,610,540 in 2009.
(1960,204608) and (2009,1610540)
Write the equation of the secant line joining these two points on the curve?
The Average rate of growth is 28589 per year
The Slope of the line connecting is m = 28589 pee year.
How to calculate the valueThe average rate of growth is a measure of how much a quantity or variable changes on average over a certain period of time. It is calculated by dividing the total change in the quantity by the length of the time period. The formula for the average rate of growth is:
Average Rate of Growth = (Final Value - Initial Value) / Time Interval
Average rate of growth = 1611,589-210733 / 2009-1960
= 28589 per year
Slope of the line connecting ( 1960, 210, 733) 4 (2009, 1,611, 589) will be:
m = У2 - y1 / x2 - x1
m = 28589 per year
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An electrician leans an extension ladder against the outside wall of a house so that it reaches an electric box 27 feet up. The ladder makes an angle of 62^{\circ}
∘
with the ground. Find the length of the ladder. Round your answer to the nearest tenth of a foot if necessary.
The length of the ladder is 14.36 feet. To the nearest tenth of a foot, the length of the ladder is 14.4 feet.
Explain trigonometric concept?Trigonometric functions such as sine, cosine, and tangent are used to model and describe physical phenomena like waves, sound, and light.
The given problem can be solved using the trigonometric concept. The basic trigonometric equation used is:
Opposite Side (S) = Adjacent Side (L) x Tan(θ)
Where θ is the angle in degrees and L is the length of the ladder.
In this problem,
θ = 62°
S = 27 ft
Using the equation, we can find the length of the ladder (L).
L = S/Tan(θ)
L = 27/Tan(62°)
L = 27/1.88
L = 14.36 ft
The length of the ladder is 14.36 feet. To the nearest tenth of a foot, the length of the ladder is 14.4 feet.
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358 words typed in 5 minutes
Fraction is a part of whole.Fractions are written in the form of two numbers, one on top of the other, separated by a horizontal line. The number on the top is called the numerator, and the number at the bottom is called the denominator.
What is fraction?
A fraction is a mathematical concept that represents a part of a whole or a group. It is a way of expressing a number that is less than one and greater than zero.
The numerator represents the part of the whole or group that is being referred to, and the denominator represents the total number of parts in the whole or group. For example, if we have a pizza that is cut into eight equal slices, and we eat three slices, we can represent the amount of pizza we ate as the fraction 3/8. In this case, the numerator is 3, which represents the number of slices we ate, and the denominator is 8, which represents the total number of slices in the pizza.
Fractions can be used in a variety of mathematical operations, including addition, subtraction, multiplication, and division. To add or subtract fractions, the denominators must be the same. If they are not, the fractions must be converted into equivalent fractions with the same denominator before they can be added or subtracted.
Multiplying fractions involves multiplying the numerators together and the denominators together. Dividing fractions involves multiplying the first fraction by the reciprocal of the second fraction, which is obtained by switching the numerator and denominator of the second fraction.
Fractions are commonly used in everyday life, such as when cooking or measuring ingredients, calculating percentages, and dealing with money. For example, if a store is having a sale with a discount of 20%, we can represent the sale price as the fraction 4/5, since the price after the discount is 80% of the original price.
It is important to note that fractions can also be expressed as decimals or percentages. To convert a fraction to a decimal, we divide the numerator by the denominator. To convert a fraction to a percentage, we multiply the fraction by 100.
In conclusion, fractions are an important concept in mathematics and are used in many different areas of our daily lives. They represent a part of a whole or group and are written in the form of a numerator over a denominator. Fractions can be used in a variety of mathematical operations and can be expressed as decimals or percentages.
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Correct question is "What is fraction? Write 358 words about it "
dr. sanchez conducts a simple random sample of 500 men who became fathers for the first time in the past year. he finds that 23% of them report being unsure of their ability to be good fathers, plus or minus 4%. if dr. sanchez increased his sample size to 1,000, which of the following would happen? group of answer choices the margin of error would become smaller. the true estimate would increase. external validity would become less important. statistical validity would become negatively affected.
The margin of error would have been much smaller if Dr. Si Sanchez had increased his sample size to 1,000.
A margin of error quantifies the amount of random sampling error in survey results. The smaller the margin of error, the larger the sample size. This is due to the fact that a larger sample size reduces the amount of random variation in the data, allowing the estimate to be more precise.
Dr. Sanchez's margin of error decreases as he increases his sample size from 500 to 1000, because sample size is proportional to margin of error.
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which statement about bar charts is true? group of answer choices bar charts are typically used to illustrate the pieces within a whole. bar charts cannot be used to compare amounts or quantities. bar charts are more versatile than pie charts and line charts. bar charts can be used to represent only a few types of data.
The statement "bar charts are more versatile than pie charts and line charts" is true.
The statement "bar charts are more versatile than pie charts and line charts" is true. Bar charts are versatile and can be used to compare data, show trends over time, and compare different categories or groups. They are especially useful for showing data with distinct categories, such as nominal data. In contrast, pie charts are limited in their use because they can only represent parts of a whole, while line charts are best suited for showing trends over time. Bar charts can be customized to display a wide range of information and are a valuable tool for communicating data effectively in a variety of contexts.
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The box plots display measures from data collected when 20 people were asked about their wait time at a drive-thru restaurant window.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 8.5 to 15.5 on the number line. A line in the box is at 12. The lines outside the box end at 3 and 27. The graph is titled Super Fast Food.
A horizontal line starting at 0, with tick marks every one-half unit up to 32. The line is labeled Wait Time In Minutes. The box extends from 9.5 to 24 on the number line. A line in the box is at 15.5. The lines outside the box end at 2 and 30. The graph is titled Burger Quick.
Which drive-thru is able to estimate their wait time more consistently and why?
Burger Quick, because it has a smaller IQR
Burger Quick, because it has a smaller range
Super Fast Food, because it has a smaller IQR
Super Fast Food, because it has a smaller range
The drive-thru is able tο estimate their wait time mοre cοnsistently will be A. Burger Quick, because it has a smaller IQR.
Hοw tο explain the IQR?The range οf values in the middle οf the scοres is knοwn as the interquartile range, οr IQR. The apprοpriate measure οf variability is the interquartile range when a distributiοn is skewed and the median is used instead οf the mean tο shοw a central tendency.
The cοrrect οptiοn here is Burger Quick, because it has a smaller IQR (Interquartile Range). IQR is the difference between the third quartile and the first quartile, which is represented by the bοx in the bοx plοt. In this case, the IQR fοr Burger Quick is 24 - 9.5 = 14.5, while the IQR fοr Super Fast Fοοd is 15.5 - 8.5 = 7. A smaller IQR indicates that the data is mοre cοnsistent and less spread οut.
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The recipe for a gallon of mint chocolate ice cream calls for 4 fluid ounces of vanilla. Tyler is making 6 gallons of mint chocolate ice cream for a bake sale. How many cups of vanilla does he need?
Tyler need 24 cups of vanilla for making 6 gallons of mint chocolate ice cream for a bake sale.
We know that the recipe for a gallon of mint chocolate ice cream calls for 4 fluid ounces of vanilla. Tyler is making 6 gallons of mint chocolate ice cream for a bake sale, we need to find how many cups of vanilla does he need:
therefore, first we need to find the ratio according to the statement above:
one gallon of mint chocolate : fluid ounces of vanilla = 1:4
now we need to find how many cups of vanilla does he needs for 6 gallons = 1 x 6 : 4 x 6
= 6 : 24
therefore it is clear that Tyler need 24 cups of vanilla for making 6 gallons of mint chocolate ice cream for a bake sale.
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At a toy store, a small bag contains 25 marbles, and a medium sized bag contains 7S marbles. The ratio of the number of marbles in the small bag to the number of marbles in the medium bag is equivalent to the ratio of the number of marbles in the medium bag to the number of marbles to the large bag. How many marbles are in the large bag?
Answer:
Let the number of marbles in the large bag be L. Then we have: 25 : 7S = 7S : L Multiplying both sides by 7S, we get: 25(7S) = (7S)^2 : L 175S = 49S^2 : L L = (49S^2) / 175 L = (7S^2) / 25 Therefore, the number of marbles in the large bag is (7/25) times the number of marbles in the medium bag.
17. A circular track is represented by the equation x² - 18x + y²-22x = -177.
What is the center of the circular track?
A (3, 11)
B (6,9)
C (9,11)
D (3,9)
The answer is C) (9, 11) which represents the center of the circular track.
What is circle?A circle is a closed, two-dimensional shape where every point in the plane is equally spaced from a central point. The line of reflection symmetry is formed by all lines that traverse the circle. Additionally, every angle has rotational symmetry around the middle.
To find the center of the circular track, we need to convert the given equation into the standard form of the equation of a circle, which is:
(x - h)² + (y - k)² = r²
where (h, k) is the center of the circle and r is the radius.
First, we need to complete the square for x and y terms:
x² - 18x + y² - 22x = -177
(x² - 18x + 81) + (y² - 22x + 121) = -177 + 81 + 121
(x - 9)² + (y - 11)² = 25
Now, we can see that the equation is in the standard form of the equation of a circle, where the center is (9, 11) and the radius is √25 = 5.
Therefore, the answer is C) (9, 11) which represents the center of the circular track.
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which of the following forms of research or data would be more likely used by a quantitative research study than by a qualitative research study? a. interview data b. personal narrative data c. economic data d. archival data
The form of "research-data" which is likely to be used by quantitative research study than by a qualitative research study is (c) Economic data.
The Quantitative research depends on numerical data and statistical analysis to answer research questions, while
The Qualitative research depends on non-numerical data such as words, images, or observations to gain an understanding of the context of the phenomenon being studied.
The Economic data, such as data on income, expenditures, or market trends, is typically collected and analyzed using statistical methods, making it more suitable for quantitative research.
Therefore, the correct option is (c) economic data.
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The given question is incomplete, the complete question is
Which of the following forms of research or data would be more likely used by a quantitative research study than by a qualitative research study?
(a) interview data
(b) personal narrative data
(c) economic data
(d) archival data.
The line plot displays the number of roses purchased per day at a grocery store.
A horizontal line starting at 1 with tick marks every one unit up to 10. The line is labeled Number of Rose Bouquets, and the graph is titled Roses Purchased Per Day. There is one dot above 1 and 10. There are two dots above 6, 7, and 9. There are three dots above 8.
Which of the following is the best measure of variability for the data, and what is its value?
The range is the best measure of variability, and it equals 3.
The range is the best measure of variability, and it equals 9.
The IQR is the best measure of variability, and it equals 3.
The IQR is the best measure of variability, and it equals 9.
The best measure of variability for the data is None of the given options is correct as the range is the best measure of variability, and it equals 7.
The best measure of variability for the given data would be the range, which is the difference between the maximum and minimum values in the dataset.
From the given line plot, we can see that the minimum value is 1 and the maximum value is 8, which gives a range of 8-1 = 7. Therefore, neither of the options that state the range as 3 or 9 is correct.
The IQR (interquartile range) is another measure of variability, which is the difference between the 75th percentile (Q3) and the 25th percentile (Q1) of the dataset. However, the line plot does not provide enough information to calculate the quartiles or the IQR. Therefore, neither of the options that mention the IQR is correct either.
Hence, the answer is: None of the given options is correct as the range is the best measure of variability, and it equals 7.
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suppose y varies directly as x and y = 21 when x = 3. find y when x =2
Answer:
If y varies directly as x, then we can express this relationship using a proportionality constant k, such that:
y = kx
To solve for k, we can use the initial condition given:
y = 21 when x = 3
Substituting these values into the equation above, we get:
21 = k * 3
Solving for k, we get:
k = 7
Now that we have k, we can use the equation to find y when x = 2:
y = kx
y = 7 * 2
y = 14
Therefore, when x = 2, y = 14.
Step-by-step explanation:
what is the probability the proportion of total weight contributed by the fine powders exceeds one half
The approximate probability that more than 10% of the sample would report experiencing extreme levels of stress during the past month, assuming the true proportion is 15%, is 0.9693
To solve this problem, we will use the normal approximation to the binomial distribution. We can assume that the number of students who report experiencing extreme levels of stress follows a binomial distribution with parameters n = 160 and p = 0.15, where n is the sample size and p is the true proportion of students who have experienced extreme levels of stress in the population.
The expected value of the number of students who report experiencing extreme levels of stress in the sample is:
E(X) = np = 160 * 0.15 = 24
The variance of the number of students who report experiencing extreme levels of stress in the sample is
Var(X) = np(1-p) = 160 * 0.15 * 0.85 = 18.36
The standard deviation of the number of students who report experiencing extreme levels of stress in the sample is
SD(X) = sqrt(Var(X)) = sqrt(18.36) = 4.28
To calculate the probability that more than 10% of the sample would report experiencing extreme levels of stress during the past month, we need to convert the percentage into a number. Since the sample size is 160, 10% corresponds to 16 students. We want to find the probability that X > 16.
To standardize the distribution, we calculate the z-score
z = (16 - 24) / 4.28 = -1.87
Using a standard normal distribution table or calculator, we can find the probability that a z-score is less than -1.87, which is approximately 0.0307. Therefore, the probability that more than 10% of the sample would report experiencing extreme levels of stress during the past month is approximately 1 - 0.0307 = 0.9693
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I have solved the question in general, as the given question is incomplete.
The complete question is:
Suppose that 15%, percent of the 1750 students at a school have experienced extreme levels of stress during the past month. A high school newspaper doesn't know this figure, but they are curious what it is, so they decide to ask a simple random sample of 160 students if they have experienced extreme levels of stress during the past month. Subsequently, they find that 10, percent of the sample replied “yes” to the question.Assuming the true proportion is 15, percent, what is the approximate probability that more than 10, percent of the sample would report that they experienced extreme levels of stress during the past month?
.
Laboratory technicians recorded the population of a species of bacteria each hour for 7 hours. The population in
thousands after x hours can be modeled by the exponential function f(x) = 575(1+040).
Choose the correct answer from each drop-down menu to complete the statements.
The initial population of bacteria when the technicians began recording was BLANK 1.
The population is BLANK 2 at the rate of BLANK 3 per hour.
BLANK 1 ?
805,000
575,000
230,000
BLANK 2 ?
805,000
575,000
230,000
BLANK 3
805,000
575,000
230,000
The answer for BLANK 1 is 575,000. This is because the exponential function given is f(x) = 575(1+0.40)ˣ.
The answer for BLANK 2 is 805,000.
The correct answer for BLANK 3 is 230,000.
What is exponential function?An exponential function contains an exponent. It is written as f(x)=b^x where b is the base and x is the exponent. Exponential functions can represent growth or decay, and the graph of an exponential function is an exponential curve.
The correct answer for BLANK 1 is 575,000.
This is because the exponential function given is f(x) = 575(1+0.40)ˣ. This means that the initial population at x=0 is 575,000.
The correct answer for BLANK 2 is 805,000. This is because the exponential function given is f(x) = 575(1+0.40)ˣ.
This means that the population at x=7 hours is 805,000.
The correct answer for BLANK 3 is 230,000. This is because the exponential function given is f(x) = 575(1+0.40)ˣ.
This means that the population increases by 230,000 per hour. This can be calculated by taking the difference between the population at x=7 hours (805,000) and the population at x=0 (575,000) and dividing it by 7 hours.
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PLEASE ANSWER!!!!!
Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. Find the probability that a worker selected at random makes between $400 and $550
Answer:
49.87%
Step-by-step explanation:
We know the following information:
$400 is the average weekly wage
$50 is the standard deviation (from the average wage)
To solve for the probability that a randomly-selected worker makes between $400-550, we have to solve for the standard score of each end of the range.
First, the standard score (Z) of $400:
[tex]Z = \dfrac{\text{value}-\text{average}}{\text{std deviation}}[/tex]
[tex]Z_{400} = \dfrac{400-400}{50} = 0[/tex]
The standard score of $400 is 0, since it is the average (mean) wage.
Second, the standard score of $550:
[tex]Z_{550} = \dfrac{550-400}{50} = 3[/tex]
The standard score of $550 is 3.
The probability that a worker's weekly wage is between $400 and $550 is equal to the probability that the standard score is between 0 and 3.
So, we can plug the standard scores that we just solved for into a distribution calculator to determine both probabilities.
P(0 < Z < 3) ≈ 49.87%
the plot below displays living spaces (apartment, dorm, northside, off-campus) vs. music (does not play an instrument, plays an instrument). what is true about the plot in terms of the relationships between the two variables? select all that apply.
The relationship is non-existent and positive about the plot in terms of the relationships between the two variables.
A scatter plot is a graph that compares two different sets of data by plotting them as points on a graph. A scatter plot is utilized to investigate the degree of correlation between two different data sets. The points' placement on a scatter plot implies a correlation between the two data sets that can be classified as positive, negative, or non-existent.
The following statements are true about the plot in terms of the relationships between the two variables:There is no association between music and living spaces.Therefore, the answer is: non-existent.The majority of students who play an instrument live off-campus.Therefore, the answer is: Positive.There is no association between the Northside and playing an instrument.Therefore, the answer is: Non-existent.
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suppose that we also have reason to believe (from previous studies) that the population standard deviation of credit card debts for this group is $150. what is the sample size needed to reduce the margin of error to $25 for a 95% confidence interval?
We need a sample size of 35 to reduce the margin of error to $25 for a 95% confidence interval, given that we have reason to believe that the population standard deviation of credit card debts for this group is $150.
To determine the sample size needed to reduce the margin of error to $25 for a 95% confidence interval, we can use the following formula:
n = (z * σ / E)²
Where:
n = sample size
z = z-score corresponding to the desired confidence level (1.96 for 95% confidence)
σ = population standard deviation
E = desired margin of error
Substituting in the given values:
n = (1.96 * 150 / 25)²
n = 34.57
Rounding up to the nearest whole number, we get a sample size of 35. Therefore, we need a sample size of 35 to reduce the margin of error to $25 for a 95% confidence interval, given that we have reason to believe that the population standard deviation of credit card debts for this group is $150.
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f(x) is the same as y just that we need to use it as f(x)= Instead of y=
The table below represents the function F.
x. 3 4 6 7 8
f(x). 9 17 65 129 257
The equation that represents this function is
1) F(x) = 3*
2) F(x) = 3r
3) F(x) = 2* + 1
4) F(x) = 2r +3
So the equation that represents the function F is F(x) = 2^(x-3) + 1.
None of the above equations represent the function given in the table. To find the equation, we need to look for a pattern in the outputs (f(x)) based on the inputs (x).
Starting with x=3, we see that f(x)=9. Moving to x=4, we see that f(x) increases by 8 to equal 17. Moving to x=6, we see that f(x) increases by 48 to equal 65. Each time we move to the next input value, the output increases by double the previous increase plus 1. This pattern can be written as:
f(x) = 2^(x-3) + 1
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Do you know the answer? Please show work. Thank you!
Answer:
The height of the statue is 152ft.
Step-by-step explanation:
305 = 153 + h
152 = h
The following function shows the approximate height (in feet) of a tennis ball t seconds after being dropped from an initial height (in feet). When will a tennis ball hit the ground if it is dropped from an initial height of 400 feet?
The tennis ball will hit the ground [tex]5[/tex] seconds after being dropped from an initial height of [tex]400[/tex]feet.
What function shows the approximate height?To determine when the tennis ball hits the ground, we need to find the value of t when h becomes 0, since at that time the height of the ball is zero, which means it has hit the ground.
So, we can set [tex]h = 0[/tex] and solve for t:
[tex]0 = -16t^2 + 400[/tex]
Adding 16t^2 to both sides:
[tex]16t^2 = 400[/tex]
Dividing both sides by 16:
[tex]t^2 = 25[/tex]
Taking the square root of both sides:
[tex]t = \pm5[/tex]
Since we cannot have a negative time, we can disregard the negative solution.
Therefore, the tennis ball will hit the ground [tex]5[/tex] seconds after being dropped from an initial height of [tex]400[/tex] feet.
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