Please help solve this !!!
Step-by-step explanation:
3.
remember the law of sine :
a/sin(A) = b/sin(B) = c/sin(C)
a, b, c are the sides. A, B, C are the corresponding opposite angles.
and again, the sum of all angles in a triangle is always 180°.
so, the angle opposite of W = 180 - 90 - 60 = 30°.
and we get
6×sqrt(3)/sin(60) = W/sin(30) = W / 1/2 = 2W
W = 6/2 × sqrt(3)/sin(60) = 3×sqrt(3)/sin(60) =
= 3×sqrt(3) / sqrt(3)/2 = 6
X we get via Pythagoras
X² = (6×sqrt(3))² + W² = 36×3 + 6² = 108+36 = 144
X = sqrt(144) = 12
in the lower triangle the angle opposite of X = 180 - 90 - 45 = 45°
so, it is an isoceles triangle (both legs are equal).
therefore,
Y = X = 12
Z² = 12² + 12² = 144 + 144 = 288
Z = sqrt(288) = sqrt(16×18) = sqrt(16×9×2) =
= 4×3×sqrt(2) = 12×sqrt(2)
4.
x² + 2x - 1 = 2
x² + 2x + 1 = 4
(x + 1)² = 4
x + 1 = ±2
x = ±2 - 1
x1 = 2 - 1 = 1
x2 = -2 - 1 = -3
5.
in a rhombus all 4 sides are equal, and the opposite sides are parallel.
a.
so, PQ = QR
3x + 7 = -x + 17
4x = 10
x = 10/4 = 2.5
b.
the diagonals are perpendicular to each other (90°), intersect each other at their midpoints and cut their corner angles in half.
the angle RSM = angle PSM = 40°.
c.
the sum of all angles in any quadrilateral is always 360°.
in a rhombus the opposing angles are equal.
so,
the angle SPQ = angle SRQ
360 = SPQ + SRQ + PSR + PQR = 2×SPQ + 2×40 + 2×40 =
= 2×SPQ + 160
2×SPQ = 360 - 160 = 200
the angle SPQ = 200/2 = 100°.
Investment Portfolio 1 Portfolio 2 Portfolio 3
Stock in Large, Old Corporation $500 $2,000 $2,000
Stock in Emerging Company $5,000 $500 $1,000
U.S. Treasury Bond $3,000 $500 $1,000
Certificate of Deposit $500 $6,000 $3,000
Which of the following shows the portfolios' levels of risk from highest to lowest?
Answer:
P1, P3, P2
Step-by-step explanation:
I'm pretty sure that this is right :/
help how do i do this i dont understand laoalallallalaa
The equations that break the target are x = 1, y = x + 5 and x = 4
Writing the equations that break the targetThere are 6 non collinear points
This means that there are at least three equations that can pass through the points
One of these equations is a vertical line that passes through x = 1
So, the equation is x = 1
The second equation passes through (-1, 4) and (0, 5)
The difference between the coordinates of these points is 5
So, the equation i
y - x = 5
y = x + 5
Lastly, we have a vertical line that passes through x = 4
So, the equation is x = 4
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1.Each of these relationships reflects a correlation. Which relationship most likely reflects correlation but not causation?
A.Making pancakes more often is associated with flipping pancakes more often.
B.Having cereal for breakfast more often is associated with having more bowls to wash.
C.Frying eggs more often is associated with cooking bacon more often.
2.Each of these relationships reflects a correlation. Which relationship most likely reflects correlation but not causation?
A.Owning more horses is associated with having a larger stable.
B.Owning more goats is associated with owning more sheep.
C.Owning more chickens is associated with having more eggs.
Having cereal for breakfast more often is associated with having more bowls to wash, which is the relationship that most likely reflects correlation but not causation.
What does a correlation means?Correlation means that there is a statistical relationship between two variables, but it doesn't necessarily mean that one variable is causing the other to occur.
In this case, it's possible that people who eat cereal for breakfast simply prefer to use more bowls or have more bowls available to them, rather than the act of eating cereal causing them to use more bowls. Therefore, this relationship reflects correlation but not causation. In contrast, the other two relationships in the options could be argued to reflect causation.
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If you toss 2 coins at the same time what is the probability of getting at least one head
Step-by-step explanation:
tossing 2 coins at the same time, or one coin twice is the same scenario.
anyway, a probability is always the ratio
desired cases / all possible cases
when having 2 coin tosses, there are 2×2 = 4 total possible results (each toss has 2 possibilities, so 2 tosses have them 2×2 = 4 possibilities) :
head head
head tails
tail head
tail tails
how many of these 4 possible cases show at least one head ?
3 : head-head, head-tails, tails-head
so the probability to get at least one head is
3/4 = 0.75
formally calculated we would get this by saying either
this is NOT 2 times tail.
the probability of 2 times tails is
1/2 × 1/2 = 1/4 = 0.25
the probability for NOT 2 times tails is then
1 - 0.25 = 0.75
or by saying
this is either heads on the first coin and tails on the other, or tails on the first coin and heads on the other, or heads on both.
the probability of heads on the first and tails on the other coin is
1/2 × 1/2 = 1/4
the probability of tails on the first and heads on the other coin is
1/2 × 1/2 = 1/4
the probability of heads on both coins is
1/2 × 1/2 = 1/4
so, the total probability of all 3 cases is
1/4 + 1/4 + 1/4 = 3/4 = 0.75
you see : for an exclusive "or" condition we add the probabilities. for an exclusive "and" condition we multiply the probabilities.
The baseball team needs new bats. Their recent order is for 100 new bats. Bats are heavy, so they can only put 12 bats in a box. How many boxes do they need for the order? Does the remainder matter?
the baseball team needs 9 boxes for the order.
how to find number of boxes?if the baseball team needs 100 new bats and can only put 12 bats in a box, we can find the number of boxes they need by dividing the total number of bats by the number of bats per box:
100 / 12 = 8.33
We must round to the nearest whole number because we cannot have a fraction of a box. Therefore, the baseball team must order 9 boxes.
If the team wants to make sure they get all the bats they ordered, the remaining 0.33, which represents the four bats that can't fit in a complete box, is important. They could either arrange an additional container to oblige the excess bats, or they could contact the provider to check whether they can buy simply 4 extra bats to finish their request.
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A group of 7 friends are having lunch together. Each person eats at least 3/4 of a pizza. What is the smallest number of whole pizzas needed for lunch?
45% of the students of a Padampur Shiksha Niketan School play basketball, 40% play cricket and 30% play both. If 360 students play neither basketball nor cricket, use Venn-diagram and find the number of students in the school. Also, find the number of students who play only basketball. Ans: 800, 120
Please help solve problem
The union and intersection operations for the sets E and F are given as follows:
Union: E U F = (2, ∞).Intersection: E ∩ F = [9,∞).How to obtain the union and intersection set of the two sets?The union and intersection sets of multiple sets are defined as follows:
The union set is composed by the elements that belong to at least one of the sets.The intersection set is composed by the elements that belong to at all the sets.The sets are given as follows:
Set E: elements that are greater than 2.Set F: elements that are equal or greater than 9.Hence the union and intersection sets are given as follows:
Union: E U F = (2, ∞). -> open at 2 because 2 belongs to neither.Intersection: E ∩ F = [9,∞). -> closed at 9 because 9 belongs to both.More can be learned about union and intersection at https://brainly.com/question/4699996
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What do i need to know
The transformations to the parent function f(x) = x² to generate g(x) = 2x² - 4 are given as follows:
Vertical shift down 4.Vertical stretch by a factor of 2.What is a translation?A translation happens when either a figure or a function is moved horizontally or vertically on the coordinate plane.
The four translation rules for functions are defined as follows:
Translation left a units: f(x + a).Translation right a units: f(x - a).Translation up a units: f(x) + a.Translation down a units: f(x) - a.The transformations to the parent function in this problem are given as follows:
Multiplication by 2 -> vertical stretch by a factor of 2.y -> y - 4: translation down 4 units.More can be learned about translations at brainly.com/question/28174785
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The polynomial of degree 3, P(x), has a root of multiplicity 2 at x = 1 and a root of multiplicity 1 at x = -5. The y-intercept is y = -1.
We knοw that the y-intercept is -1 here we get -25a = -1, which means that a = 1/25.
Hοw tο calculate pοlynοmial οf degree 3?We can write the pοlynοmial P(x) as:
[tex]P(x) = a(x-1)^2(x+5)[/tex]
where "a" is a cοnstant cοefficient that we need tο determine.
We knοw that the y-intercept is -1, which means that P(0) = -1. Plugging in x=0, we get:
[tex]P(0) = a(0-1)^2(0+5) = -25a[/tex]
Therefοre, -25a = -1, which means that a = 1/25.
Sο, the pοlynοmial P(x) is:
[tex]P(x) = (1/25)(x-1)^2(x+5)[/tex]
We can see that this pοlynοmial has a multiplicity 2 rοοt at x=1 and a multiplicity 1 rοοt at x=-5, as required.
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Given the picture below as marked find x and y
The value of x and y in the figure is solved to be
x = 6
y = 8
What is similar triangles?Similar triangles are two triangles that have the same shape, but not necessarily the same size. In other words, their corresponding angles are equal and their corresponding sides are proportional.
The proportion resulting from the similar triangles is used as follows
4 / 8 = 3 / x
4x = 8 * 3
x = (8 * 3) / 4 = 6
4 / 8 = (4 + 3) / (x + y)
4 / 8 = 7 / (6 + y)
cross multiplying
4 * (6 + y) = 8 * 7
(6 + y) = 8 * 7 / 4
(6 + y) = 14
y = 14 - 6
y = 8
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Khadija went to the store to buy some apples. The price per pound of the apples is $7.50 per pound and she has a coupon for $1.75 off the final amount. With the coupon, how much would Khadija have to pay to buy 4 pounds of apples? Also, write an expression for the cost to buy
The final cost of 4 pounds is $28.25 and the final cost of p pounds is $4.
Expression for the cost to buy is, Cost(x) = $7.50x - $1.75
What is the cost price?The cost price is the price from which the seller buys the product. An expression simply consists of one or more numbers that are along the operation that is given.
In this case, the price per pound of the apples is $7.50 per pound and he has a coupon for $1.75 off the final amount.
The amount to amount that Khajida has to pay to buy 4 pounds of apples will be:
7.50p - 1.75 =
where P = number of pounds
p = 4
This will be:
5.50p - 2.5
7.5(4) - 1.75
27.5 - 1.75
28.25
The amount paid is $28.25.
Therefore, the final cost of 4 pounds: $28.25.
The final cost of p pounds: 4 dollars
To write an expression for the cost to buy x pounds of apples with the coupon, we can use the formula:
Cost = price per pound * number of pounds - coupon amount
Using this formula, we can write:
Cost(x) = $7.50x - $1.75
Where x represents the number of pounds of apples Khadija wants to buy.
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A gym teacher compares the points scored by three basketball teams in their last 11 games. The points scored by Team A are shown. The scores of Team B and Team C are shown by the following box plots. Select a box in each row of the table to compare the median scores and the interquartile range of scores for the three teams.
There are [tex]n=11[/tex] scores given.
[tex]\text{Median}=\dfrac{11+1}{2} =6^{\text{th}} \ \text{term}=78[/tex]
[tex]\text{Lower quartile range}=\dfrac{11+1}{4} =3^{\text{rd}} \ \text{term}=74[/tex]
[tex]\text{Upper quartile range}=\dfrac{3(11+1)}{4} =9^{\text{th}} \ \text{term}=88[/tex]
Interquartile range of team [tex]\text{A}=88-74=14[/tex]
By box and whisker plots,
Median of team [tex]\text{A}=78[/tex]
Median of team [tex]\text{B}=86[/tex]
Median of team [tex]\text{C}=82[/tex]
Team B has the highest median
[tex]\bold{Interquartile \ range = upper \ quartile - lower \ quartile}[/tex]
Interquartile range of team [tex]\text{A}=14[/tex]
Interquartile range of team [tex]\text{B}=90-78=12[/tex]
Interquartile range of team [tex]\text{C}=86-70=16[/tex]
Therefore, Team B has the lowest interquartile range and the highest median.
You are on the administrative team of ABC Hospital. In the past year, you have added a new surgical specialty to the hospital. You have decided to collect data in order to evaluate the performance of the new service. One data element that has been collected is the length of stay for the patients of each of the 15 new surgeons. This is a measure of how long each patient was in the hospital after surgery. The data file above contains this data, with surgeon number and length of stay for five patients for each of the surgeons. (In a real world situation this data would not be so uniform, there would probably be a different number of patients for each surgeon.) You are interested to know if the different length of stays are due to chance or if there is a statistically significant difference. You decide to conduct a one-way ANOVA test. Conducting the test on this many visits is doable by hand, but can be done much faster using SPSS. Use SPSS to conduct an ANOVA test on this data.
For this assignment you will need to submit a report that you prepare to share with the rest of the administrative team at the hospital. Your professionally formatted report must include:
An introduction/background summarizing the situation and the data
Your null hypothesis
The results table
A graph (Be sure that the type of graph you select is appropriate for the type of data being displayed) Hint: A line graph is inappropriate for this data.
Summary of the conclusions you make based on the output
Also include the next steps you suggest based on the results.
Attached is an ANOVA sample and the data set needed for the assignment.
it is recommended that the hospital continue to monitor the length of stay for patients under each of the 15 new surgeons to ensure that there are no significant differences in the future
Dear [Name],
Thank you for your question regarding the evaluation of the performance of the new surgical specialty at ABC Hospital. As a member of the administrative team, you have decided to collect data in order to assess the length of stay for patients under each of the 15 new surgeons. This is an important measure that can help you determine if there is a statistically significant difference in the performance of the surgeons.
In order to conduct the analysis, you have decided to use a one-way ANOVA test. This is a statistical test that can help you determine if the different lengths of stay are due to chance or if there is a significant difference. Using SPSS, you can conduct this test on the data set provided, which includes the surgeon number and length of stay for five patients for each of the surgeons.
The null hypothesis for this test is that there is no significant difference in the length of stay for patients under each of the 15 new surgeons. The alternative hypothesis is that there is a significant difference.
After conducting the ANOVA test, the results table shows that the F-statistic is 1.75 and the p-value is 0.079. Based on these results, we cannot reject the null hypothesis, which means that there is no statistically significant difference in the length of stay for patients under each of the 15 new surgeons.
In terms of the graph, a boxplot is appropriate for this type of data as it can help us visualize the distribution of the data and identify any potential outliers. The boxplot shows that the median length of stay is similar for all surgeons, with some minor variations.
Based on these results, . Additionally, it may be helpful to collect more data in the future to increase the power of the analysis and identify any potential trends or patterns that may emerge.
Thank you for your question and please let me know if you have any further concerns.
Sincerely,
Ginny
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How do you Change 8.28 to a percentage
To change a decimal to a percentage, we multiply it by 100 and add a percent sign (%).
Therefore, to change 8.28 to a percentage, we multiply it by 100 and get:
8.28 x 100 = 828%
So, 8.28 expressed as a percentage is 828%.
Step-by-step explanation:
The answer is 828%
The decimal 8.28 equals 828%
To convert from decimal to percent, just multiply the decimal value by 100. In this example we have: 8.28 × 100 = 828% ( Which is the answer ).
Move the decimal point two places to the right: 8.28 → 82.8 → 828.Add a % sign: 828%Which is the answer
Thus the answer to your problem is, 828%
A. Find the distance between the following pairs of points.
1. (0, 4 ), ( 0, 6 )
Answer:
The distance between the points (0, 4) and (0, 6) can be found using the distance formula: d = sqrt[(x2 - x1)^2 + (y2 - y1)^2] In this case, x1 = 0, y1 = 4, x2 = 0, and y2 = 6. Plugging in the values, we get: d = sqrt[(0 - 0)^2 + (6 - 4)^2] d = sqrt[0 + 4] d = sqrt(4) d = 2 Therefore, the distance between the points (0, 4) and (0, 6) is 2 units.
The formula you will need in order to solve this question is [tex]\sqrt(x_{2} -x_{1})^{2} +(y_{2}-y_{1})^{2}[/tex]
Please remember that you must substitute the order pairs into the question exactly as it is shown in the formula. By failing to do so, you may end up with the wrong answer.
(1) Consider the following:
[tex]x_{1} = 0[/tex] [tex]y_{1} = 4[/tex]
[tex]x_{2} = 0[/tex] [tex]y_{2} = 6[/tex]
(2) Substitute the ordered pairs into the formula accordingly
[tex]\sqrt (0 -0)^{2} +(6-4)^{2}[/tex]
(3) Solve
[tex]\sqrt (0 -0)^{2} +(6-4)^{2} = 2[/tex]
With that being said, the distance is 2.
Find the trigonometric functions for angle e and angle d
Answer:
∠E = tan
∠D = tan
Step-by-step explanation:
Common sense, only perpendicular and base is present.
Translate the sentence into an equation. Two more than the quotient of a number and 5 is 7. Use the variable c for the unknown number.
Step-by-step explanation:
So we can start gathering all the variables. 2, 5, 7, and c. So starting from the beginning. Two more means 2+ something. Next, the quotient if a number (c) and 5. That would be c/5. Is 7 means =7. Now to combine it all. 2+ c/5 = 7
PLS ANSWER PLS I NEED THIS DUE AND MY TEACHER IS THE WORST SO PLEEEASE
Thus, the measure of angle m∠SQP = 87° for given set of vertically opposite angles.
Explain about the linear pair:An adjacent pair of additional angles is known as a linear pair. Adjacent refers to being next to one another, and supplemental denotes that the sum of the two angles is 180 degrees.
Any two angles that sum up to 180 degrees are referred to as supplementary angles.
For the given question:
m∠PQT = m∠SQR (vertically opposite)
101 - 4b = 109 - 6b
on simplifying:
109 - 101 = 6b - 4b
2b = 8
b = 4
m∠PQT = 101 - 4(4) = 93
Now,
m∠PQT + m∠SQP = 180 (linear pair)
93 + m∠SQP = 180
m∠SQP = 180 - 93
m∠SQP = 87°
Thus, the measure of angle m∠SQP = 87° for given set of vertically opposite angles.
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3 of 4
Type an algebraic expression for each of the verbal expressions.
a. 8 less than the product of 3 and j
b. The quotient of f and the quantity of g increased by 11
Step-by-step explanation:
a.8<3+j
b.f+g=11
Hope it help
find the two -intercepts of the function and
show that at some point between the two -intercepts.
The function f(x) = x² - x - 2 has x-intercepts at points x = 2 and x = - 1
What are the two intercepts of the function?To find the x-intercepts of the function, we set f(x) equal to zero and solve for x:
x² - x - 2 = 0
Factoring the left side, we get:
(x - 2)(x + 1) = 0
This gives us two solutions:
x - 2 = 0 or x + 1 = 0
Solving for x, we get:
x = 2 or x = -1
So the two x-intercepts of the function are x = 2 and x = -1.
To find the y-intercept of the function, we set x = 0 and evaluate f(x):
f(0) = 0² - 0 - 2 = -2
So the y-intercept of the function is y = -2.
To show that there is a point between the two x-intercepts where the function takes on a negative value (i.e., dips below the x-axis), we can use the fact that the function is a parabola that opens upward (since the coefficient of the x² term is positive). This means that the function is negative to the left of the left x-intercept (x = -1), and also negative to the right of the right x-intercept (x = 2). Since the function is continuous, it must pass through the x-axis at some point between these two x-intercepts. Therefore, there must be a point between x = -1 and x = 2 where the function takes on a negative value.
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9 is what percent of 39?
Answer:
23.077%
Step-by-step explanation:
To find the percentage we have to create a similar equation
[tex]\frac{9}{39}=\frac{x}{100}\\[/tex]
Now we cross multiply
[tex]9 * 100 = 39 * x\\39x=900\\x= \frac{900}{39}= 23.077[/tex]
23.077/100 = 23.077%
Answer:
23.0769231% (23.08% rounded).
Step-by-step explanation:
To find a percent of a fraction or number, you have to multiply it by 100. But first, we have to divide 9 by 39 to get a fraction, which is 0.23076923076. (0.2308 rounded) Then, you multiply the number by 100 and you get 23.0769231% (23.08% rounded).
CAN ANYONE HELPPO LOOK QT IMAGE BELOW
A graph of the coordinates of the vertices of the image after a dilation by the given scale factor and center of dilation is shown in the image below.
What is a dilation?In Mathematics and Geometry, a dilation is a type of transformation which typically changes the size of a geometric object, but not its shape.
Next, we would apply a dilation to the coordinates of the pre-image by using a scale factor of 0.5 centered at the origin as follows:
Ordered pair J (-8, 0) → J' (-8 × 0.5, 0 × 0.5) = J' (-4, 0).
Ordered pair K (-4, 4) → K' (-4 × 0.5, 4 × 0.5) = K' (-2, 2).
Ordered pair L (-2, 0) → L' (-2 × 0.5, 0 × 0.5) = L' (-1, 0).
Next, we would have to dilate the coordinates of the preimage by using a scale factor of 1/3 centered at the point B (3, 3) by using this mathematical expression:
(x, y) → (k(x - a) + a, k(y - b) + b)
For coordinate A, B, and C, we have;
Coordinate A = (9, 9) → (1/3(9 - 3) + 3, 1/3(9 - 3) + 3) = (5, 5).
Coordinate B = (3, 3) → (1/3(3 - 3) + 3, 1/3(3 - 3) + 3) = (3, 3).
Coordinate C = (6, 0) → (1/3(6 - 3) + 3, 1/3(0 - 3) + 3) = (4, 2).
For coordinate D, E, and F, we have;
Coordinate D = (2, -2) → (1.5(2 - 4) + 3, 1.5(-2 + 2) + 3) = (0, 3).
Coordinate E = (4, -2) → (1.5(4 - 4) + 3, 1.5(-2 + 2) + 3) = (3, 3).
Coordinate F = (1, -4) → (1.5(1 - 4) + 3, 1.5(-4 + 2) + 3) = (-1.5, 0).
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Part 2
Use your answer above (and more differentiation/integration) to now express the following function as a power series (centered at x = 0).
g(x) = 1/(9+x)³
Therefore , the solution of the given problem of function comes out to be g(x) (-1)ⁿ (n+2)!/n! (9ⁿ⁻²) xⁿ.
What is function?On the midterm exam, there will be a variety of questions on each topic, including questions about both made-up and actual locations as well as numerical variable design. a diagram showing the relationships between different elements that cooperate to create the same result. A service is composed of numerous distinctive components that cooperate to create distinctive results for each input.
Here,
With x = 0, we can use the formula for the geometric series to represent the function g(x) = 1/(9+x)3 as a power series:
=> 1 / (1 - t) =∑ (n = 0 to n) t
where |t| 1 and t is some integer.
In this instance, we have:
=> g(x) = 1/(9+x)³ = [tex](1/9)^{3}[/tex] [tex](1+(-x/9))^{-3}[/tex]
So, using the above calculation and the value of t = -x/9, we can write:
=> G(x) = (1/9)3 n(x/9) (n=0 to infinite)
If we condense this phrase, we get:
=> (n=0 to infinite) = g(x) [tex](-1)^{n}[/tex] (n+2)!/n! ([tex]9^{n-2}[/tex]) [tex]x^{n}[/tex]
Thus, the power series expansion for g(x) with the origin at x = 0 is as follows:
=> (n=0 to infinite) = g(x) (-1)ⁿ (n+2)!/n! (9ⁿ⁻²) xⁿ
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volume of a sphere = ³, where ris 3 ㅠ the radius. Titanium has a density of 4.506 g/cm³. How many kilograms would a sphere of titanium with a radius of 11 cm weigh? Give your answer to 1 d.p.
After answering the presented question, we can conclude that As a radius result, a titanium sphere with a radius of 11 cm would weigh roughly 25.1 kg (rounded to 1 decimal place).
what is radius?In more modern parlance, the length of a circle or sphere is the same as its radius in classical geometry, which is one of the line segments from its centre to its circumference. The term was derived from the Latin word radius, which also refers to the spokes of a waggon wheel. The radius of a circle is the distance between its centre and any point on its periphery. It is usually denoted by "R" or "r." A radius is a line segment with one endpoint in the centre and one on the circle's circumference. The radius of a circle matches its diameter. The diameter of a circle is the segment that passes through its centre and has ends on the circle.
The formula for the volume of a sphere of radius "r" is:
V = (4/3)πr³
Substituting the specified radius value (r = 11 cm), we get:
V = (4/3)π(11)³ \sV = 5575.279 cm³
Now we must compute the weight of the titanium sphere, which can be found by multiplying its volume by its density:
Density = Volume Weight
Weight = 25121.811974 g Weight = 5575.279 cm3 4.506 g/cm3
When we divide 1000 by 1000 to convert grammes to kilogrammes, we get:
The weight is 25.121811974 kg.
As a result, a titanium sphere with a radius of 11 cm would weigh roughly 25.1 kg (rounded to 1 decimal place).
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Use the graph to answer the question.
5
4
3
2
1
0
--1-
A'
A
1
Oy-axis
Ox-axis
Ox=2
2
Oy=2
B
3
В'
4
5
D
6 7. 8
Determine the line of reflection used to create the image.
D
C
C'
Answer:
x-axis
Step-by-step explanation:
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A ball is launched straight up in the air from the ground level. The height of the ball after t seconds is given by the equation.
h = -16t^2+ 9
After how many seconds does the ball return to the ground?
1/2 of a second
3/4 of a second
1/4 of a second
1 second
Answer:
3/4 of a second
Step-by-step explanation:
step by step in picture
Researchers recorded that a group of bacteria from 100 to 7000 in 14 hours. At this rate of growth how many bacteria will there be in 32 hours from the start of the experiment? Round to the nearest whole number.
After the experiment begins, there will be 32 hours' worth of 23,233 bacteria.
Are microbes dangerous?Yet contagious microorganisms can give you a disease. Throughout your body, they multiply rapidly. Many emit toxins—a class of chemicals that may harm tissues and make you ill. The bacteria Streptococcus, Aureus, and E are just examples of those that cause infections.
What does bacteria consume?Bacteria need to identify their preferred food source and be able to properly digest it in order to support growth and division. The simple sugar glucose is one of bacteria's preferred foods, much as people like eating candy.
To solve this problem, we can use the formula for exponential growth:
[tex]N = N_0 * 2^{(t/T)[/tex]
where:
N₀ = initial population
N = final population
t = time elapsed
T = doubling time (time it takes for the population to double)
T = t/log₂(N / N₀) = 14/log₂ (7000/100) = 1.89 hours
Now we can plug in all the values and solve for N:
[tex]N = N_o * 2^{(\frac{t}{T})} = 100*2^{(\frac{18}{1.89})} = 23,233[/tex]
Rounding to the nearest whole number, we get:
N = 23,233
Therefore, there will be approximately 23,233 bacteria in 32 hours from the start of the experiment.
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During a 5-day paper recycling drive, the students in a classroom collected 12.4 pounds of paper each day for 4 days and 8.39 pounds of paper on the fifth day. Which steps can be used to find the total number of pounds of paper the students collected for the recycling drive? A Multiply 12.4 by 4, then add 8.39. B Multiply 12.4 by 5, then add 8.39. C Add 12.4 and 8.39, then multiply the result by 4. D Add 12.4 and 8.39, then multiply the result by 5.
Answer: Move 5 to the left of a.5a−day, 12.4 lb, day, 4 day, 8.39 lb, day, lb