An incoming freshman took her college’s placement exams in French and mathematics. In French, she scored 92 and in math 80. The overall results on the French exam had a mean of 72 and a standard deviation of 17, while the mean math score was 70, with a standard deviation of 8. What are the z-scores for the two subjects?

A. -1.18, and 1.25

B. 1.18, and -1.25

C. 8, and 17

D. 1.18, and 1.25

Answer:

0.73,0.71 this is the answer

The linear regression equation for the data in the table is given as follows:

y = 3x - 2.

To find the regression equation, which is also called called line of best fit or least squares regression equation, we need to insert the points (x,y) in the calculator.

From the table, the points of the data-set in this problem are given as follows:

(1, 4), (2, 1), (3, 5), (4, 10), (5, 16), (6, 19), (7, 15).

Using a calculator, the line of best fit is given as follows:

y = 3x - 2.

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Answer:

tan D = 4.9/9.1 = 7/13

tan F = 9.1/4.9 = 13/7

The value of the denominator in the expression is 0.205.

The value of the denominator in the expression is calculated as follows;

The given expression is;

x = 0 + √1.16 / ?

when x = 5.252, the value of the Uknown is calculated as follows;

5.252 = 0 + √1.16 / ?

5.252 = √1.16 / ?

make the unknown "?" the subject of the formula;

? = √1.16 /5.252

? = 0.205

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$480 worth of fuses can power 240 motors. This is calculated by dividing $480 by $2 to get the total amount of policies that can be purchased. Then the total number of fuses is divided by 3, which is the number of fuses per motor.

This calculation results in 240 motors that can be supplied with $480 worth of fuses. In more detail, the calculation is as follows:

(480/2) / 3 = 240

This means that 240 engines can be supplied with $480 worth of fuses. This calculation is based on the assumption that each motor requires 3 fuses and that each fuse costs $2

Hopes this helps with your question. :)

Answer:

23 motors

Step-by-step explanation:

fuses = $4

motor uses 3 fuses = $4 × 3 = $12

$284 ÷ 12 = 23.6 = 23 motors

There is sufficient evidence at 0.10 because Yes, because 0.001 < 0.10

Alana is running a test to analyze if the amount of messages transmitted between them surpasses an average of 100 daily.

The given α, or significance level, is 0.10, which requires proof strong enough to affirm the alternative hypothesis (H: μ > 100) while negating the null hypothesis (H0: μ = 100), supposing P < 0.10.

As the P-value is approximately 0.001 and hence lower than 0.10, it is sufficient evidence prohibitting acceptance of the null hypothesis and proposing that they usually dispatch more than 100 communications each day.

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Alana and her friends have been using a group messaging app for over a year to chat with each other. She suspected that, on average, they sent each other more than 100 messages per day. She took a random sample of 30 days from their chat history and recorded how many messages were sent on those days. The sample data had a mean of 127 messages and a standard deviation of 44 messages.

Alana used those results to test Hoμ= 100 messages versus H: > 100 messages, where is the average number of messages sent per day. She calculated a test statistic of t≈ 3.36 and a P-value of approximately 0.001. Assume that the conditions for inference were met.

Is there sufficient evidence at the a = 0.10 level to conclude that, on average, they sent each other more than 100 messages per day?

Choose 1 answer:

No, because 0.001 < 0.10.

Yes, because 0.001 < 0.10.

No, because 0.001 < 3.36.

Yes, because 0.001 < 3.36.

The radius are already given and hidden in the images. For example:

7) Radius = 4.1

8) Radius = 8.7

9)  Radius = 3

10) Radius = 7

A radius of a circle or sphere is any of the line segments from its center to its perimeter in classical geometry, and in more recent use, it is also their length. The term is derived from the Latin radius, which means both ray and spoke of a chariot wheel.

The diameter is the distance across a circle via its center. The radius is the distance from the center of a circle to any point on its edge. 2r=d; the radius is half the diameter. 2 r = d .

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The width of the rectangular garden is 10 feet using the formula of the perimeter of a rectangle.

The perimeter of a rectangle is the sum of the lengths of all its sides. If the length of a rectangle is l and the width is w, then the perimeter is given by the formula:

Perimeter = 2l + 2w

In other words, the perimeter is twice the length plus twice the width.

Let's denote the width of the garden with "w".

The perimeter of the garden is the sum of the lengths of all sides:

P = 2w + 2l

where "l" is the length of the garden. We know that the perimeter of the garden (i.e., the length of the fence) is 60 feet, and the length of the garden is 20 feet. So we can plug these values into the equation:

60 = 2w + 2(20)

Simplifying the equation:

60 = 2w + 40

Subtracting 40 from both sides:

20 = 2w

Dividing both sides by 2:

w = 10

Therefore, the width of the garden is 10 feet.

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So the probability of a random person having no credit cards is 1/3, or approximately 0.3333.

Probability denotes the possibility of something happening. It is a mathematical branch that deals with the occurrence of a random event. The value ranges from zero to one.

The likelihood that a person chosen at random did not have any credit cards is the ratio of those who did not have any credit cards to the total number of people:

P(No credit cards)  = (Number of persons without credit cards) /(Total number of people)

According to the table, the number of people who did not have credit cards is the sum of the values in the "Zero" column, which is 27. The sum of all the values in the table, which is 81, is the total number of persons. Therefore:

P(Credit Cards Not Accepted) = 27/81

simplified term:

P(Without credit cards) = 1/3

So the probability of a random person having no credit cards is 1/3, or approximately 0.3333.

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Complete question:

In the image form.

Answer:

82,000

Step-by-step explanation:

Answer:

The sin B got canceled and the one left same as on the other parenthesis inside the parenthesis I canceled the cos so one left now 1*1=1 and 1 over tan b plus 1 over tan b- we extract the tan to opp/adj then opp and adjacent got canceled and the one too so just only one left so 1=1

A) Expansion of the given fraction expression gives: ⁵/₆x - 1

B) The given fraction expression is not the same as that of part A

A) We are given the expression:

¹/₂x + 3 + ¹/₃x - 4

Regrouping this to get like terms together gives:

(¹/₂x + ¹/₃x) + (3 - 4)

x(¹/₂ + ¹/₃) - 1

= ⁵/₆x - 1

B) We are given the expression:

¹/₂(x + 3) + ¹/₃(x - 4)

Expanding the bracket gives:

¹/₂x + ³/₂ + ¹/₃x - ⁴/₃

= ¹/₂x + ¹/₃x + ³/₂ - ⁴/₃
= ⁵/₆x + ¹/₉

This is not the same as the answer in Part A.

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The probabilities for this problem are given as follows:

A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.

The number of cars with purchase prices less than $20,000 is given as follows:

86 + 67 + 35 = 188.

Of those 188 cars, 86 had repair costs less than $10,000, hence the probability is given as follows:

p = 86/188

p = 0.4574.

The number of cars with repair costs less than $10,000 is given as follows:

86 + 71 + 40 = 197.

Of those, 40 had a purchase price of more than $40,000, hence the probability is given as follows:

p = 40/197

p = 0.203.

The table is given by the image presented at the end of the answer.

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The activity-based cost (rounded to the nearest cent) for each tape drive unit is approximately $0.434.

Given the activity cost and activity base data, we can calculate the allocated costs for each activity as follows:

Procurement:

Allocated cost for tape drives = (Activity cost for procurement * Number of purchase orders for tape drives) / Total number of purchase orders

= ($370,000 * 4,000) / (4,000 + 300 + 1,400 + 10 + 2,000)

= $1,480,000 / 7,710 ≈ $192.11

Scheduling:

Allocated cost for tape drives = (Activity cost for scheduling * Number of production orders for tape drives) / Total number of production orders

= ($250,000 * 150) / (4,000 + 150 + 800 + 10 + 8,000)

= $37,500 / 12,960 ≈ $2.89

Materials handling:

Allocated cost for tape drives = (Activity cost for materials handling * Number of moves for tape drives) / Total number of moves

= ($500,000 * 800) / (4,000 + 300 + 1,400 + 10 + 2,000)

= $400,000 / 7,710 ≈ $51.83

Product development:

Allocated cost for tape drives = (Activity cost for product development * Number of engineering changes for tape drives) / Total number of engineering changes

= ($730,000 * 10) / (4,000 + 150 + 800 + 10 + 8,000)

= $7,300,000 / 12,960 ≈ $562.73

Production:

Allocated cost for tape drives = (Activity cost for production * Machine hours for tape drives) / Total machine hours

= ($1,500,000 * 8,000) / (4,000 + 150 + 800 + 10 + 8,000)

= $12,000,000 / 12,960 ≈ $925.93

Now, we can calculate the total allocated cost for tape drives by summing up the allocated costs for each activity:

Total allocated cost for tape drives = Allocated cost for procurement + Allocated cost for scheduling + Allocated cost for materials handling + Allocated cost for product development + Allocated cost for production

= $192.11 + $2.89 + $51.83 + $562.73 + $925.93

= $1,735.49

Finally, we can calculate the activity-based cost per unit for tape drives by dividing the total allocated cost by the number of tape drive units:

Activity-based cost per unit for tape drives = Total allocated cost for tape drives / Number of tape drive units

= $1,735.49 / 4,000

≈ $0.434

Therefore, the activity-based cost (rounded to the nearest cent) for each tape drive unit is approximately $0.434.

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Answer:

Step-by-step explanation:

a

The value of the quadratic expression  ax² + bx when x = 5 is 10.

A quadratic expression is an expression in which the highest power of the unknown is 2.

Since we have the expression ax² + bx takes the value 6 when x = 1 and 10 when x = 2. We need to find its values when x = 5.

We proceed as follows.

Let y = ax² + bx.

When x = 1, y = 6. So, substituting these into the equation, we have that

y = ax² + bx

a(1)² + b(1) = 6

a + b = 6    (1)

Also, when x = 2, y = 10. So, substituting these into the equation, we have that

y = ax² + bx

a(2)² + b(2) = 10

4a + 2b = 10    (2)

From (1) a = 6 - b  (3).

So, substituting equation (3) into (2), we have that

4a + 2b = 10

4(6 - b) + 2b = 10

24 - 4b + 2b = 10

24 - 2b = 10

-2b = 10 - 24

-2b = -14

b = -14/-2

b = 7

Substituting b into (3). we have that

a = 6 - b

= 6 - 7

= - 1

So, substituting a = - 1 and b = 7 into the quadratic expression, we have that

y =  ax² + bx

= -1x² + 7x

= -x² + 7x

So, the value of the expression when x = 5 is

= -x² + 7x

= -(5)² + 7(5)

= -25 + 35

= 10

So, the value is 10

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Answer: D

Step-by-step Explanation:

Circumference of a circle is : 2 [tex]\pi \\[/tex] r

Radius: diameter/2

Plug into equation and round.

2[tex]\pi[/tex](6) = 37.7 or 38.

The best measure of variability for this data is the range, and its value is 10.

The range, which is the difference between the dataset's largest and smallest values, is the appropriate variable for the data at hand.

We simply subtract the smallest value from the largest value to determine the range:

Range = 12 - 2 = 10

Therefore, the best measure of variability for this data is the range, and its value is 10.

Variability, not mean and median, are measures of central tendency. Another way to measure variability is the IQR (interquartile range), but it's not the best option for this dataset because it only takes into account the middle half of the data and may not cover the whole range of values.

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The probability that less than 75% of the sample students have iPhones is approximately 0.2478.

What is probability?

This is a binomial probability problem, where each student either has an iPhone or does not have an iPhone, and the probability of success (having an iPhone) is 0.789.

Let X be the number of students in the sample who have an iPhone. We want to find P(X < 0.75 * 50) = P(X < 37.5)

Using the binomial probability formula, we have:

P(X < 37.5) = Σ P(X = k), for k = 0, 1, 2, ..., 37

However, this is a tedious calculation. Instead, we can use a normal approximation to the binomial distribution, since n * p = 50 * 0.789 = 39.45 > 10 and n * (1 - p) = 50 * 0.211 = 10.55 > 10.

Using the normal approximation, we can standardize the random variable X:

Z = (X - μ) / σ

where μ = n * p = 39.45 and σ = √(n * p * (1 - p)) = √(50 * 0.789 * 0.211) = 2.88.

Then, we have:

P(X < 37.5) = P(Z < (37.5 - 39.45) / 2.88) = P(Z < -0.68)

Using a standard normal table or calculator, we find that P(Z < -0.68) is approximately 0.2478.

Therefore, the probability that less than 75% of the sample students have iPhones is approximately 0.2478.

Binomial probability is a type of probability distribution that describes the number of successes in a fixed number of independent trials, where each trial has only two possible outcomes: success or failure. It assumes that the probability of success in each trial is constant, and the trials are independent of each other. The binomial distribution is characterized by two parameters: the number of trials and the probability of success in each trial.

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The image of (-12, 4) after a dilation by a scale factor of 1/4 centered at the origin is (-3, 1).

What is image of points?

In geometry, the image of a point is the position of that point after a transformation. The transformation can be a translation, rotation, reflection, dilation or any combination of these.

When we apply a transformation to a point, the resulting image may be located at a different position in the plane, or it may be the same point if the transformation is an identity transformation (i.e., no change occurs).

For example, if we translate a point (x, y) by a distance of (a, b), then its image (x', y') can be found using the formula,

x' = x + a

y' = y + b

Similarly, if we rotate a point (x, y) by an angle of θ degrees around the origin, then its image (x', y') can be found using the formula:

x' = xcos(θ) - ysin(θ)

y' = xsin(θ) + ycos(θ)

Likewise, if we reflect a point (x, y) about the x-axis, then its image (x', y') can be found using the formula,

x' = x

y' = -y

And if we dilate a point (x, y) by a scale factor of k with respect to a center of dilation (h, k), then its image (x', y') can be found using the formula,

x' = h + k(x - h)

y' = k(y - k)

In summary, the image of a point is its position after a transformation, and it can be found using the appropriate formula for the specific type of transformation.

Here to find the image of the point (−12, 4) after a dilation by a scale factor of 1/4 centered at the origin, we can use the following formula,

(x', y') = (1/4)(x, y) where (x, y) is the original point, and (x', y') is its image after dilation.

Substituting the values of the original point,

(x', y') = (1/4)(-12, 4)

Simplifying,

(x', y') = (-3, 1)

Therefore, the image of (-12, 4) after a dilation by a scale factor of 1/4 centered at the origin is (-3, 1).

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Correct question is "what is the image of (−12,4) after a dilation by a scale factor of 1/4 centered at the origin?"

To simplify 6x8y ÷ -3x2y2, we first need to divide the coefficients and simplify the variables separately.

Dividing 6 and -3 gives us -2.

For the variables, we subtract the exponents of x and divide them, which gives us x^(8-2) or x^6.

We also subtract the exponents of y and divide them, which gives us y^(1-2) or y^-1. To simplify y^-1, we move the variable to the denominator and make it y^1 or simply y.

Therefore, our final answer is -2x^6y.

So, 6x8y ÷ -3x2y2 = -2x^6y

Answer:

Step-by-step explanation:

The graphs can be sketched without using any software.

The person must leave the money in the bank for approximately 10.6 years (rounded to the nearest tenth of a year) for it to reach 8700 dollars.

To solve this problem,  the compound interest formula:

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

where:

A = the future worth of the speculation

P = the underlying speculation (present worth)

r = the yearly loan cost (as a decimal)

n = the times the interest is accumulated each year

t = the quantity of years

We need to find the worth of t that will make An equivalent to 8700 bucks. We are aware that P is $3,500 and that r is 6.25 percent, or 0.0625 in decimal form. The value of n is unknown, but the fact that the interest is compounded annually indicates that n is 1.

Substituting these values into the formula, we get:

[tex]8700 = 3500(1 + 0.0625/1)^{1t}[/tex]

Simplifying the right side, we get:

[tex]8700 = 3500(1.0625)^t[/tex]

Dividing both sides by 3500, we get:

[tex]2.485714286 = 1.0625^t[/tex]

Taking the logarithm of both sides (with any base), we get:

[tex]log(2.485714286) = log(1.0625^t)[/tex]

Using the power rule of logarithms, we can bring the exponent t down:

[tex]log(2.485714286) = t log(1.0625)[/tex]

Dividing both sides by log(1.0625), we get:

[tex]t = log(2.485714286) / log(1.0625)[/tex]

Using a calculator, we get:

t ≈ 10.6

Therefore, to reach $8700, the individual must keep the money in the bank for approximately 10.6 years (rounded to the nearest tenth of an year).

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The possible number of minutes Pablo has used his phone in a month is given by the inequality m ≥ 1009 minutes

Given data ,

Let's assume that the number of minutes Pablo has used his phone in a month is denoted by "m". Given that he pays a monthly fee of $24 and an additional $0.06 per minute, the total cost of his phone service in a month can be expressed as:

Total cost = Monthly fee + (Per minute charge x Number of minutes used)

Total cost = $24 + ($0.06 x m)

On simplifying , we get

$ 84.54 = $24 + ($0.06 x m)

Subtracting 24 on both sides , we get

m = $60.54 / $0.06

m = 1009 minutes

Hence , the inequality is m ≥ 1009 minutes

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Okay, let's do this step-by-step:

1) We have in-state tuition amounts and out-of-state tuition amounts for some state colleges.

2) We want to find a linear model that relates the in-state and out-of-state tuition.

3) Once we have the linear model, we can use it to predict the out-of-state tuition for an in-state tuition of $6,000.

Let's assume the data points are:

In-state tuition | Out-of-state tuition

$3,000 | $9,000

$5,000 | $11,000

$7,000 | $13,000

$9,000 | $15,000

To find the linear model:

1) Find the slope:

Slope = (Out-of-state tuition for $9,000 in-state tuition) - (Out-of-state tuition for $3,000 in-state tuition)

= $15,000 - $9,000 = $6,000

Slope = $6,000

2) Find the y-intercept:

y-intercept = Out-of-state tuition when In-state tuition = 0

= $9,000

So the linear model is:

Out-of-state tuition = Slope * In-state tuition + y-intercept

= $6,000 * In-state tuition + $9,000

To predict Out-of-state tuition for $6,000 In-state tuition:

Out-of-state tuition = $6,000 * $6,000 + $9,000

= $36,000 + $9,000

= $45,000

Rounding to the nearest choice:

Out-of-state tuition for $6,000 In-state tuition = $45,000

So the answer is c. about $12,450

Let me know if you have any other questions!

The probability of the Doubles" means both dice show the same number is 36.

When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.

The probabilities of these two outcomes must be added in order to get the likelihood of rolling an even number or doubles, but since we have already tallied those outcomes twice, the probability of rolling both doubles and an even number must be subtracted. The probability of rolling doubles and an even number is 1/36 since rolling two sixes is the only method to get a double and an even number.

The likelihood of rolling an even number or doubles is thus:

The formula for P(even number or doubles) is P(even number) = P(even number) + P(doubles) - P(even number and doubles) = 1/2 + 1/6 - 1/36 = 19/36.

The odds of rolling an even number or two doubles are 19/36.

Therefore, the probability of the Doubles" means both dice show the same number is 36.

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The correct answer is option A. That is the average cost of gasoline, Clinton and Stacy will spend on gasoline for the round trip to Yellowstone National Park and back home is $1,166.40.

Miles and gallons are two different units of measurement and cannot be converted directly to each other. Miles measure distance, while gallons measure volume. However, it is possible to calculate the number of gallons of gasoline used for a given distance traveled if you know the fuel efficiency of the vehicle in miles per gallon.

To calculate the number of gallons used, you can divide the number of miles traveled by the fuel efficiency in miles per gallon. For example, if you travel 100 miles and your vehicle gets 25 miles per gallon, you will use 4 gallons of gasoline (100 miles / 25 miles per gallon = 4 gallons).

Given that the distance from their home to Yellowstone National Park is 1,701 miles. And on average the RV gets 10.5 miles per gallon and on average the cost of a gallon of gasoline is $3.60.

The round trip from their home near Austin, Texas, to Yellowstone National Park and back is a distance of 2 x 1,701 = 3,402 miles.

Since the RV gets 10.5 miles per gallon, the total gallons of gasoline required for the round trip would be 3,402/10.5 = 324 gallons.

The total cost of gasoline for the round trip would be 324 x $3.60 = $1,166.4.

Therefore, the answer is option A. $1,166.40.

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Answer: No, she will not be audited

Step-by-step explanation: 40 - 26 =16 which is the increase. the increase is 16/40 which is equal to 2/5 which can be expressed as a percent such as 40% far away from 62.5

(1)The break - even sales for last year is $600000.

(2)(a) The operating income for last year is $300000.

(b) The maximum operating income that could have been realized during the year is $337500.

In mathematics, a range refers to the set of all possible values or outputs that a function or relation can produce. It is the collection or set of all values that a function can take on as its output when given various inputs from its domain.

The term "volume" typically refers to the measure of the amount of space occupied by a three-dimensional object. It is a quantitative measure of the capacity or size of a solid shape in three-dimensional space. Volume is often used to describe the amount of space enclosed by an object or the amount of material it can hold.

Cost-Volume-Profit (CVP) Chart for Last Year:

To construct a CVP chart, we need to plot the sales, variable costs, fixed costs, and profit (or operating income) on the y-axis and the number of units sold on the x-axis.

Based on the given information:

Sales = $900,000

Unit selling price = $200

Variable cost per unit = $125

Fixed costs = $225,000

Maximum sales within relevant range = 7,500 units

Using the formula for calculating the break-even point:

Break-even point (in units) = Fixed Costs / (Unit Selling Price - Variable Cost per Unit)

Break-even point (in units) = $225,000 / ($200 - $125) = 3,000 units

Now we can construct the CVP chart:

Sales:

The sales line will start from the origin (0,0) and have a slope of $200 per unit, as the unit selling price is $200.

Variable Costs:

The variable costs line will also start from the origin (0,0) and have a slope of $125 per unit, as the variable cost per unit is $125.

Fixed Costs:

The fixed costs line will be a horizontal line parallel to the x-axis, at a height of $225,000, as the fixed costs are constant and do not change with the number of units sold.

Profit (Operating Income):

The profit line can be calculated by subtracting the total variable costs and fixed costs from the total sales. So, the profit line will start from the origin (0,0) and have a slope of ($200 - $125) per unit, which is the difference between the unit selling price and variable cost per unit.

The break-even point will be the point where the profit line intersects the x-axis, which is at 3,000 units. So, the break-even sales for last year is 3,000 units x $200 per unit = $600,000.

Verification using the break-even equation:

Break-even point (in units) = Fixed Costs / (Unit Selling Price - Variable Cost per Unit)

Break-even point (in units) = $225,000 / ($200 - $125) = 3,000 units

Operating Income for Last Year and Maximum Operating Income:

Operating Income for Last Year:

Operating Income = Sales - Variable Costs - Fixed Costs

Operating Income = $900,000 - ($125 x Number of Units Sold) - $225,000

Substituting the break-even point of 3,000 units, we get:

Operating Income = $900,000 - ($125 x 3,000) - $225,000

Operating Income = $900,000 - $375,000 - $225,000

Operating Income = $300,000

Maximum Operating Income:

The maximum operating income can be achieved at the maximum sales within the relevant range, which is 7,500 units.

Operating Income = Sales - Variable Costs - Fixed Costs

Operating Income = ($200 x 7,500) - ($125 x 7,500) - $225,000

Operating Income = $1,500,000 - $937,500 - $225,000

Operating Income = $337,500

Verification using the mathematical approach to CVP analysis:

Plugging in the values for last year's sales of 7,500 units:

Let's calculate the maximum operating income using the mathematical approach to CVP analysis:

Operating Income = (Unit Selling Price x Number of Units Sold) - (Variable Cost per Unit x Number of Units Sold) - Fixed Costs

Given:

Unit Selling Price = $200

Variable Cost per Unit = $125

Fixed Costs = $225,000

Number of Units Sold = 7,500

Putting  the values:

Operating Income = ($200 x 7,500) - ($125 x 7,500) - $225,000

Operating Income = $1,500,000 - $937,500 - $225,000

Operating Income = $337,500

So, the maximum operating income that could have been realized during the year is $337,500.

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