Find the surface area of a rectangular prism with dimensions of 6m by 4 m by 15

Answers

Answer 1

Answer: 348 square meters

Step-by-step explanation:

To find the surface area of a rectangular prism, we need to calculate the area of each of the six faces and add them together. A rectangular prism has three pairs of opposite faces: the length (l) and width (w), the length (l) and height (h), and the width (w) and height (h).

Given dimensions: length (l) = 6m, width (w) = 4m, and height (h) = 15m

Area of the length and width faces (lw): 6m * 4m = 24m²

Since there are two opposite faces, the total area of these faces is 2 * 24m² = 48m².

Area of the length and height faces (lh): 6m * 15m = 90m²

Since there are two opposite faces, the total area of these faces is 2 * 90m² = 180m².

Area of the width and height faces (wh): 4m * 15m = 60m²

Since there are two opposite faces, the total area of these faces is 2 * 60m² = 120m².

Now, add the areas of all the faces together:

Surface area = 48m² (lw faces) + 180m² (lh faces) + 120m² (wh faces) = 348m²

The surface area of the rectangular prism is 348 square meters.

Answer 2

Answer:

the surface area of the rectangular prism is 348 square meters.

Step-by-step explanation:

The surface area of a rectangular prism can be found using the formula:Surface Area = 2lw + 2lh + 2whwhere l, w, and h are the length, width, and height of the prism.In this case, the dimensions of the rectangular prism are:l = 6m

w = 4m

h = 15m

Substituting these values into the formula, we get:

Surface Area = 2(6m)(4m) + 2(6m)(15m) + 2(4m)(15m)

Surface Area = 48m^2 + 180m^2 + 120m^2

Surface Area = 348m^2


Related Questions

Find the inverse function of y = 3x

Answers

Answer:

Step-by-step explanation:

To find the inverse of the function y = 3x, we need to swap the positions of x and y and then solve for y.

Step 1: Swap the positions of x and y

x = 3y

Step 2: Solve for y

Divide both sides by 3

x/3 = y

So the inverse function of y = 3x is x/3.

We can also verify that this is the inverse function by plugging in x/3 for y in the original equation and confirming that we get x:

y = 3x

x/3 = 3x/3

x/3 = x

Therefore, the inverse function of y = 3x is x/3.

Answer:

Step-by-step explanation:

The given function is y = 3x.

To find its inverse, we start by swapping x and y in the equation to get:

x = 3y

Next, we solve this equation for y to isolate it:

y = x/3

Therefore, the inverse of y = 3x is y = x/3.

The diagram shows a prism.

The cross-section can be divided into three identical rectangles.

Each rectangle measures 7 cm by 4 cm.
The prism is 10cm long.

Work out the volume of the prism.

Answers

Answer:

The volume of the prism is 840 cm³.

Step-by-step explanation:

Since the cross-section can be divided into three identical rectangles, the base area of the prism is:

Area of one rectangle = 7 cm × 4 cm = 28 cm²

Area of three rectangles = 3 × 28 cm² = 84 cm²

Therefore, the base area of the prism is 84 cm².

To find the volume of the prism, we need to multiply the base area by the height of the prism.

Height of the prism = 10 cm

Volume of the prism = base area × height
= 84 cm² × 10 cm
= 840 cm³

Therefore, the volume of the prism is 840 cm³.
The height is 7 cm I kno bc I looked it up

as manager of a pizza shop, you are responsible for placing the food orders. you currently have enough anchovies for 8 pizzas. you expect to have orders for 60 pizzas tonight. if 8% of all pizzas are ordered with anchovies, what is the probability that you run out of anchovies before the evening is over? use the normal approximation for the binomial

Answers

The probability of running out of anchovies before the evening is over is approximately 0.058, or 5.8%. We must presume that the number of pizzas ordered with anchovies follows a binomial distribution with parameters n = 60 (the total number of pizzas) and p = 0.08 in order to answer this issue using the normal approximation for the binomial distribution. (the probability of ordering anchovies on a pizza). 

The standard deviation of this binomial distribution is given by = sqrt(np(1-p)) = sqrt(60 x 0.08 x 0.92) = 2.03, and the mean is given by = np = 60 x 0.08 = 4.8.

Now, we need to determine the likelihood that we will need to prepare more than eight anchovy-topped pies before the evening is through in order to determine the likelihood that we will run out of anchovies. (since we only have enough anchovies for 8 pizzas).

This is equivalent to finding the probability that the number of pizzas with anchovies is greater than 8, or P(X > 8), where X is the number of pizzas with anchovies.

To use the normal approximation for the binomial distribution, we need to standardize the variable X using the standard normal distribution. This gives us:

z = (X - μ) / σ = (8 - 4.8) / 2.03 = 1.57

Using a standard normal table or calculator, we can find the probability that z is greater than 1.57, which is approximately 0.058. Therefore, the probability of running out of anchovies before the evening is over is approximately 0.058, or 5.8%.

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Can you pls do this i can't do it, it's a little hard and due before 4:00 pm ( Will mark brainliest if 2 answers and 95 pts if you can do it pls and thank you!!)

Answers

Therefore , the solution of the given problem of ratio comes out to be John needs to use 36 cans of green beans.

What is a ratio?

The simple procedure percentage "a / b," once "b" could be a larger than zero, is used to find a group of numbers both "a" and " that appear to be equal. Two ratios are combined to form a ratio. If there were only one man and three ladies, the ratio would be 1:1. In the group, there are 3/4 women and 1/4 males. A division between things, a number, or a particular physical component of a component can all be described as having "parts."

Here,

Let's express the quantity of pumpkin cans as 5x (where x is some multiplier) and the quantity of green bean cans as 2x.

Given that there are 126 cans in total, we can construct the following equation:

=> 5x + 2x = 126

Combining related words gives us:

=>7x = 126

When we multiply both parts by 7, we get:

=> x = 18

John therefore requires 2 cans of green beans and 5 cans of pumpkin:

=> 5x = 5(18) = 90 pumpkin cans

=> 2x = 2(18) = 36 green bean cans.

So, for his exhibit, John needs to use 36 cans of green beans.

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√x = -7
Square root of x equals negative seven

Answers

the equation √x = -7 has no real solutions.

Why it is?

There is no real number x that satisfies the equation √x = -7.

The square root of a non-negative real number is always non-negative. Therefore, √x is non-negative for all real numbers x, including x = 0. However, -7 is negative, so the equation √x = -7 has no real solutions.

An equation is a statement that asserts the equality of two mathematical expressions. It generally consists of two sides, left-hand side (LHS) and right-hand side (RHS), which are separated by an equal sign (=). An equation is true when both the LHS and RHS represent the same value or expression.

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Complete question:

What is the solution to the equation √x = -7, where √x represents the square root of x and -7 is a negative number?

PLEASE HELP ILL GIVE BRAINLIEST

Answers

Answer: B

Step-by-step explanation: Answer choice B states, that same side interrior angles are supplementary so picture i shows parralel lines. This is trues, as line L and line M have interior angles that are supplementary, meaning that it ends up to 180. This concept is not true for ii, as 106 and 73 angles are not supplementary.

Jody is feeding her dog from a 10-pound bag. The dog goes through 1 pounds of food
each week.
Enter, in decimal form, how many pounds of food are left after 3 weeks.

Answers

After 3 weeks, the dog consumed 3 pounds of food, leaving 7 pounds of food left. Subtracting the amount of food consumed from the initial amount, 10 pounds - 3 pounds = 7 pounds.

How many pounds of food are left after 3 weeks?

After 3 weeks, the dog would have consumed 3 pounds of food (1 pound per week x 3 weeks = 3 pounds).

To find out how many pounds of food are left, we can subtract the amount of food consumed from the initial amount:

10 pounds - 3 pounds = 7 pounds

So there are 7 pounds of food left after 3 weeks.

Expressed in decimal form, it would be 7.0 pounds.

What is decimal form?

The base-10 numbering system, which employs ten digits (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) to represent all conceivable numerical values, is used to express numbers in decimal form. When a number is expressed in decimal form, there can be one or more digits to the left of the decimal point that represent the whole number portion of the value and one or more digits to the right of the decimal point that represent the fractional portion of the value.

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There are 32 students in the school day. the ratio of girls to all the students in the play is 5:8.

Answers

Answer: 16 girls

Step-by-step explanation:

Step 1: Calculate the total number of students in the school by multiplying 32 by the ratio of girls to all the students, which is 5:8.

32 x (5/8) = 20

Step 2: Subtract the result from 32 to get the number of girls in the school.

32 - 20 = 12

Step 3: Multiply the result by the ratio of girls to all the students, which is 5:8.

12 x (5/8) = 16

what is the area, in square feet, of the rectangle shown 6 4/5 4 3/4 below?

Answers

The area of the given rectangle is [tex]32\dfrac{6}{20}[/tex] square feet

For better understanding check the calculation here.

Calculation:

Area of the rectangle is the space inside the given triangle.

Formula: Formula to find the area of the triangle is length times width

Length and width are given as mixed fractions

Lets convert mixed fractions into improper fractions

[tex]\text{Length}=6\dfrac{4}{5} =\dfrac{6\times5+4}{5} =\dfrac{34}{5}[/tex]

[tex]\text{Width}=4\dfrac{3}{4} =\dfrac{4\times4+3}{4} =\dfrac{19}{4}[/tex]

Now we find out the area

[tex]\text{Area}=\text{length}\times\text{width}[/tex]

[tex]\text{Area}=\dfrac{34}{5} \times\dfrac{19}{4}[/tex]

[tex]\text{Area}=\dfrac{646}{20}[/tex]

Now we divide the number and find out the quotient and remainder

[tex]\text{Area}=\dfrac{646}{4}[/tex]

[tex]\text{Quotient}=32[/tex]

[tex]\text{Remainder}=6[/tex]

[tex]\text{Area}=32\dfrac{6}{20}[/tex]

The area of the given rectangle is [tex]32\dfrac{6}{20}[/tex] square feet

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Lines s and tare perpendicular. If the slope of line s is 5, what is the slope of line ?? A.-⅕ B.⅕ C. 5 D. -5​

Answers

Answer:

A) -⅕.

Step-by-step explanation:

If lines s and t are perpendicular, then their slopes are negative reciprocals of each other. Therefore, if the slope of line s is 5, the slope of line t is -1/5.

So the answer is A) -⅕.

The slope of line T is -1/5, because perpendicular lines have opposite reciprocal slopes, meaning the opposite sign (positive or negative) and flipped (whole number becomes a fraction).

2 random samples of 16 paper towels from 2 different brands were tested for absorbency. the mean amount of water absorbed for brand a was 15.63 ml. with a standard deviation of 3.12 ml. for brand b the mean was 14 ml. with a standard deviation of 2.53 ml. a) find a 95% confidence interval for the mean difference in the amount absorbed. state what df you used as well. b) does this interval suggest that there is a significant difference between brands in the amount absorbed?

Answers

The 95% confidence interval for the mean difference in the amount absorbed is (0.01, 3.25) ml, with a df of 28. Yes, the interval does not contain zero, suggesting that there is a significant difference between the two brands in the amount absorbed.

To find the 95% confidence interval for the mean difference in the amount absorbed, we can use the formula:

CI = (x1 - x2) ± tα/2 * SE

where x1 - x2 is the difference in means, tα/2 is the critical value from the t-distribution table for a 95% confidence interval with degrees of freedom (df) = 30 - 2 = 28 (assuming equal variances), and SE is the standard error of the difference in means:

SE = sqrt[(s1^2/n1) + (s2^2/n2)]

Plugging in the values, we get:

x1 - x2 = 15.63 - 14 = 1.63

s1 = 3.12, n1 = 16

s2 = 2.53, n2 = 16

SE = sqrt[(3.12^2/16) + (2.53^2/16)] = 0.974

tα/2 for df = 28 and α = 0.05 is 2.048.

CI = (1.63) ± (2.048 * 0.974) = (0.01, 3.25)

Therefore, the 95% confidence interval for the mean difference in the amount absorbed is (0.01, 3.25), with df = 28.

This interval suggests that there is a significant difference between brands in the amount absorbed, since the interval does not include 0. This means that we can reject the null hypothesis that the means are equal at a 5% significance level and conclude that the mean amount of water absorbed for brand A is significantly greater than brand B.

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1.5.17 each vertex of convex pentagon abcde is to be assigned a color. there are 6 colors to choose from, and the ends of each diagonal must have different colors. how many different colorings are possible? (2011amc10a problem 22) (a) 2520 (b) 2880 (c) 3120 (d) 3250 (e) 3750

Answers

3120 different types of colorings are possible . Thus, Option C is the correct option. There are 3 cases involved

If there are no similar color pairs then it comes down to simple permutations. Then 6 different types of colors in 5 different spots.

6! = 720 cases

No rotation is necessary because all permutation are already accounted for.

If there is one color pair then, consideration of 6 possibilities for the pair is essential 5 for the 3rd vertex, 4 for the 4th vertex, 3 for the 5th vertex

6 × 5 × 4 × 3 = 360

There are 5 different locations where the pair can be present.

360 × 5 = 1800 one pairs is possible

If there are two color pair still we have to account for 6 possibilities for the first pair then 5 possibilities for the next pair and 4 possibilities for the last pair.

6 × 5 × 4 = 120

There are 5 rotations in the pentagon so the total number of possibilities is  

120 × 5 = 600 two pairs are possible

now, we add the 3 cases to find the total number of possibilities

720 + 1800 + 600 =  3120

3120 different types of colorings are possible. Thus, Option C is the correct option.

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the pie chart shows the age distribution in a village of 120 people. how many villagers are over 60.And what percentage of villagers are under 25

Answers

We can say that approximately 48 villagers (40% of 120) are under the age of 25. This means that just under half of the population in this village is under the age of 25.

According to the pie chart, we can see that the village of 120 people has 20% of its population over the age of 60. To determine the exact number of villagers over 60, we can multiply the total population by the percentage of people over 60:

120 x 20% = 24

So there are 24 villagers over the age of 60 in this village.

As for the percentage of villagers under the age of 25, we can see from the pie chart that 40% of the population falls into this category. However, it is important to note that the question mentions a village of 120 people, while the percentage given in the chart may not reflect this exact number. Therefore, we cannot determine the exact number of villagers under the age of 25 without additional information.

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30 points!The Triangle Inequality Theorem to determine the possible whole number measures of the third side of a triangle if the first two sides measure 6 and 2. List them in ascending order.(FILL IN THE BLANK)
The measure of the third side could be__, __, or __.
THANK YOU

Answers

Answer:7,6,5

Step-by-step explanation:

So this is how I did it

So the theorem  is

a+b>c

a+c>b

b+c>a

---

Let's now substitute A= 6 and B =2 so It'll look something like

6+2> C

6+C> 2

2+C>6

From there I added like terms

8>C

4<C

2<C

Then from there I noticed the numbers 5,6,7 are the the only whole numbers between 4 and 8. So that's what I'm put as my answer.

if birr 2000 is raises to 2500 in 4 years at simle interest,then calculate the simple rate​

Answers

The simple interest rate is therefore 6.25% as the initial principal (P) is 2000 Birr and the final amount (A) is 2500 Birr.

what is interest ?

A creditor assesses interest as a cost to a borrowing in exchange for the use of money; Typically, it is expressed as a portion of the principal amount borrowed. Generally, it is the cost of getting cash.

given

The simple interest formula is

S I = P * r * t,

where I is the interest,

P is the principal (amount of money we start with),

r is the interest rate, and

t is the amount of time in years.

In this instance, we are aware that the initial principal (P) is 2000 Birr and the final amount (A) is 2500 Birr.

The interest rate (r) is constant because we also know that the interest is simple.

We may determine r by using the simple interest formula:

SI = P*r*t= 2500-2000

500 = 2000*r*4

500 = 8000r

r = 500/8000

r = 0.0625

The simple interest rate is therefore 6.25% as the initial principal (P) is 2000 Birr and the final amount (A) is 2500 Birr.

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assume that the weights are normally distributed. the vacuum company natureabhors claims their vacuums are on average lighter than the market average. we sample 31 bagless upright vacuum cleaners from nature abhors and get an average of 19.33. can we show at the 5% significance level that their average is below 19.64?

Answers

At the 5% significance level, we can reject the null hypothesis and conclude that there is sufficient evidence to suggest that the average weight of the vacuums from Nature Abhors is less than 19.64 pounds.

To answer this question, we can use a one-sample t-test, assuming that the population of weights is normally distributed. The null hypothesis is that the true mean weight of the vacuums from Nature Abhors is 19.64 pounds, while the alternative hypothesis is that it is less than 19.64 pounds.

We can calculate the t-statistic using the formula

t = (X - μ) / (s / sqrt(n))

where X is the sample mean (19.33), μ is the hypothesized population mean (19.64), s is the sample standard deviation, and n is the sample size (31).

Since we don't know the population standard deviation, we can estimate it using the sample standard deviation. We calculate the sample standard deviation as follows

s = sqrt(sum((xi - X)^2) / (n - 1))

where xi is the weight of the i-th vacuum in the sample. We assume that the weights are normally distributed, so we can use the t-distribution with (n-1) degrees of freedom to calculate the p-value.

Using a t-table or calculator, we can find the critical t-value for a one-tailed test at the 5% significance level with 30 degrees of freedom to be -1.699.

Plugging in the numbers, we get

t = (19.33 - 19.64) / (s / sqrt(31))

s = sqrt(sum((xi - X)^2) / (n - 1)) = 0.714

t = (-0.31) / (0.714 / sqrt(31)) = -1.84

Since the calculated t-value (-1.84) is less than the critical t-value (-1.699), we can reject the null hypothesis at the 5% significance level. Therefore, we can conclude that there is sufficient evidence to suggest that the average weight of the vacuums from Nature Abhors is less than 19.64 pounds.

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The probability that Isabella wins a
certain game of chance is 3/10 th
Isabella plays the game 150 times, how
many times can she expect to win the
game?

Answers

Answer:

45 times

Step-by-step explanation:

I hope this helps

Complete the following statement. Write your answer as a decimal or whole number.
__% of $10 = $1

Answers

Answer:

10% of $10=$1

Step-by-step explanation

1/10=10% hence 10% of $10 is %1

I run 10 laps around a track each day each lap is 400 meters how long would it take to run a total of 12 kilometers

Answers

Answer: 3 days

Explanation;

First, let's calculate the total distance you run each day.

Distance per lap = 400 meters
Laps per day = 10

Total distance per day = Distance per lap × Laps per day
Total distance per day = 400 meters × 10 = 4,000 meters

Now we need to find out how many days it would take to run a total of 12 kilometers (12,000 meters).

Total distance desired = 12,000 meters

Number of days = Total distance desired / Total distance per day
Number of days = 12,000 meters / 4,000 meters

Number of days = 3

So, it would take you 3 days to run a total of 12 kilometers if you run 10 laps of 400 meters each day.

Answer:

It will take 3 days to runn total of 12 Kilometers

Step-by-step explanation:

12(1000) = 12,000 meters

400(10) = 4000 meters/day

12,000/4000 = 3 days

My son having trouble with geometry homework. Please help I’m not the best at math.

Answers

Angles are created by joining the extremities of two rays, with the joint vertex representing the common terminal of the two beams. The value of ∠c= 48.65.

What are angles?

An angle is the result of the intersection of two lines.

An "angle" is the length of the "opening" between these two beams.

Angles are commonly measured in degrees and radians, a measurement of circularity or rotation.

In geometry, an angle can be created by joining the extremities of two rays. These rays are intended to represent the angle's sides or limbs.

The two primary components of an angle are the limbs and the vertex.

The joint vertex is the common terminal of the two beams.

Given,

AC = 33 cm

AB = 35.75 cm

Hence, The value of ∠C = 48.65.

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Draw a line tangent to the circle whose equation is (x-2)² + y² = 20 at the point
(0, 4). Write an equation for this tangent line.

Answers

The equation of the tangent line to the circle at the point (0, 4) is y = 1/2x + 4

How to find the equation of the tangent line

To find the equation of the tangent line to the circle at the point (0,4), we need to first find the slope of the tangent line at that point.

The slope of a tangent line to a circle at a given point is equal to the negative reciprocal of the slope of the radius that passes through that point.

The center of the circle is at the point (2, 0), and the radius passing through the point (0, 4) has a slope of:

m = (0 - 4)/(2 - 0) = -2

Therefore, the slope of the tangent line at (0, 4) is:

m' = -1/m = -1/(-2) = 1/2

Now that we have the slope of the tangent line, we can use the point-slope form of a line to find the equation of the tangent line.

The point-slope form of a line is:

y - y1 = m(x - x1)

where m is the slope of the line, and (x1, y1) is a point on the line.

Using (0,4) as the point on the line and 1/2 as the slope, we get:

y - 4 = 1/2(x - 0)

Simplifying, we get:

y = 1/2x + 4

.

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Need sum help on this somebody

Answers

Angle R is right angle (QR perpendicular to PT) then ∆PQR ~ ∆TSR   (both are similar triangle).

What is a similar triangle?

Triangles with the same shape but different sizes are called similar triangles. To put it another way, the sides and angles of the same triangle are in proportion to each other. This indicates that the shape of one of the triangles would remain unchanged regardless of how much you scaled it up or down. Similar triangles are important in geometry and have numerous practical uses in architecture and engineering.

From the given figure,

Statement                   Reason

∠P = ∠T                      AA similarity theorem

∠R is right angle        QR ⊥ PT

Then ∆PQR ~ ∆TSR   (both are similar triangle)

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One angle of a right triangle measures 85°. What is the measure of the other acute angle?

Answers

Answer:

5°

Step-by-step explanation:

The three angles of a triangle add up to 180° (every triangle, always) Since this triangle is a right triangle, one of the angles is a right angle, 90°.

Another angle is given, 85°.

x + 85° + 90° = 180°

x + 175° = 180°

x = 5°

To do this question using mental math, if one angle is 90° the other two angles must add up to 90° (thats the total of 180°) One angle is 85° then the other is 5°

If 1+1 =2 than what does 3x+5x equal

Answers

Answer:

If 1 + 1 = 2, then we can say that 1 = 2 - 1. Now, if we have 3x + 5x, we can factor out the common term of x to get: 3x + 5x = (3 + 5)x = 8x So, 3x + 5x = 8x.

f(x)=2x^3+x^2+3 then what is the remainder when f(x) is divided by x-1

Answers

Answer:  F(1) = 2. (1)^3 + (1)^2 + 3

                      = 2+1+3

                      = 7

Step-by-step explanation:

Answer:

The remainder when f(x) is divided by x - 1 is 6.

Step-by-step Explanation:

To find the remainder when f(x) is divided by x - 1, we can use the remainder theorem, which states that the remainder of f(x) when divided by x - a is equal to f(a).

So, in this case, we need to evaluate f(1) to find the remainder when f(x) is divided by x - 1:

f(1) = 2(1)^3 + (1)^2 + 3
= 2 + 1 + 3
= 6

Therefore, the remainder when f(x) is divided by x - 1 is 6.

Write the equation of a line that is perpendicular to the line y = 1/2x + 1 and goes through 6 on the x axis​

Answers

Answer:

y = - 2x + 12

Step-by-step explanation:

the equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

y = [tex]\frac{1}{2}[/tex] x + 1 ← is in slope- intercept form

with slope m = [tex]\frac{1}{2}[/tex]

given a line with slope m then the slope of a line perpendicular to it is

[tex]m_{perpendicular}[/tex] = - [tex]\frac{1}{m}[/tex] = - [tex]\frac{1}{\frac{1}{2} }[/tex] = - 2 , then

y = - 2x + c ← is the partial equation

to find c substitute (6, 0 ) , the point it crosses on the x- axis into the partial equation.

0 = - 2(6) + c = - 12 + c ( add 12 to both sides )

12 = c

y = - 2x + 12 ← equation of perpendicular line

SHORTCUT METHOD :

GIVEN EQUATION IS y = 1/2x + 1

This method teach us in order to write this equation in perpendicular form we will change the coefficient of Y axis in to X axis and X axis into Y axis by a negative of sign WITH ONE of them and rePlace constant term as K

NOW PERPENDICULAR EQUATION CAN BE WRITTEN AS

y = -2x + k

Since the line passes through the point (6,0) on the x-axis, we can substitute these values into the equation to solve for k:

0 = -2(6) + k0 = -12 + kk = 12Therefore, the equation of the line that is perpendicular to y = 1/2x + 1 and passes through the point (6,0) is y = -2x + 12.

The line plots represent data collected on the travel times to school from two groups of 15 students.

A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 4,6,14, and 28. There are two dots above 10, 12, 18, and 22. There are three dots above 16. The graph is titled Bus 47 Travel Times.

A horizontal line starting at 0, with tick marks every two units up to 28. The line is labeled Minutes Traveled. There is one dot above 10,16,20, and 28. There are two dots above 8 and 14. There are three dots above18. There are four dots above 12. The graph is titled Bus 14 Travel Times.

Compare the data and use the correct measure of variability to determine which bus is the most consistent. Explain your answer.

Bus 47, with an IQR of 8
Bus 14, with an IQR of 6
Bus 47, with a range of 8
Bus 14, with a range of 6

Answers

The correct option regarding which bus has the least spread among the travel times is,

⇒ Bus 14, with an IQR of 6.

Now, First we consider the dot plot, which shows the number of times that each observation appears in the data-set.

Then we consider the interquartile range, which gives the difference between the third quartile and the first quartile of the data-set.

The interquartile range is a better measure of spread compared to the range of a data-set, as it does not consider outliers.

For groups of 15 students, we have that:

The first half is composed by the first seven students, hence the first quartile is the fourth dot, which is the median of the first half.

The second half is composed by the last seven students, hence the first quartile is the eleventh dot, which is the median of the first half.

The quartiles for Bus 14 are given as follows:

Q1 = 12.

Q3 = 18.

Hence the IQR is of:

IQR = Q3 - Q1

= 18 - 12

= 6.

The quartiles for Bus 18 are given as follows:

Q1 = 9.

Q3 = 16.

Hence the IQR is of:

IQR = Q3 - Q1

= 16 - 9

= 7.

Hence, Bus 14 is the more consistent bus, due to the lower IQR.

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g a company has a customer retention rate of 55% per year. it is testing a new customer experience plan. what is the minimum number of customers that need to be included in the test to determine if the new plan has more than a 10 percentage point effect on customer retention, with 90% confidence? use the normal approximation. g g

Answers

The minimum number of customers that need to be included in the test to determine if the new plan has more than a 10 percentage point effect on customer retention, with 90% confidence is at least 192 customers.

To determine the minimum sample size needed to test if the new plan has more than a 10 percentage point effect on customer retention, we can use the following formula:

n = [(Zα/2 + Zβ)² × (p1 × (1-p1) + p2 × (1-p2))] / (p1 - p2)²

where:

n is the sample size needed

Zα/2 is the z-score corresponding to the desired confidence level (90% confidence corresponds to a z-score of 1.645)

Zβ is the z-score corresponding to the desired power (we'll use a power of 80%, which corresponds to a z-score of 0.84)

p1 is the retention rate under the current plan (55%)

p2 is the retention rate under the new plan (55% + 10% = 65%)

Plugging in the values, we get:

n = [(1.645 + 0.84)² × (0.55 × 0.45 + 0.65 × 0.35)] / (0.10)²

n = 191.34

Rounding up to the nearest whole number, we get a minimum sample size of 192.

Therefore, the company needs to include at least 192 customers in the test to determine if the new plan has more than a 10 percentage point effect on customer retention, with 90% confidence.

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Sophie deposited money into an account in which interest is compounded semiannually at a rate of 4.2%. She made no other deposits or withdrawals and the total amount in her account after 9 years was $24,575.22. How much did she deposit? Round answer to nearest whole number.

Answers

Sophie deposited approximately $16,516.

What are whole numbers?

The digits 0, 1, 2, 3, 4, 5, 6, 7, 8, and so forth are known as whole numbers. They are the figures we use to measure things, such as the quantity of pencils in a box or apples in a basket. In computations like addition, subtraction, multiplication, and division, whole numbers are also employed.

Let's call the amount Sophie deposited "P". After 9 years, the investment would have gone through 18 compounding periods (2 per year for 9 years).

The formula for calculating the future value (FV) of an investment with compound interest is:

[tex]FV = P(1 + r/n)^{(nt)[/tex]

where:

P = the principal (the initial amount invested)

r = the annual interest rate (as a decimal)

n = the number of times the interest is compounded per year

t = the number of years

In this case, we have:

P = unknown (what we're trying to find)

r = 4.2% = 0.042

n = 2 (since the interest is compounded semiannually, or twice a year)

t = 9

So the formula becomes:

[tex]24,575.22 = P(1 + 0.042/2)^{(2*9)[/tex]

Simplifying the right side of the equation:

24,575.22 = P(1.021)¹⁸

24,575.22 = 1.485P

Dividing both sides by 1.485:

P ≈ $16,516

Therefore, Sophie deposited approximately $16,516.

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-16/5 divided by 12/25

Answers

Answer:

-16/5 divided by 12/25 is equal to -40/3.

Step-by-step explanation:

The answer to the question you are asking is 4.05 hope it’s helpful
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