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storchak [24]
3 years ago
10

A highly selective boarding school will only admit students who place at least 1.5 z-scores above the mean on a standardized tes

t that has a mean of 110 and a standard deviation of 12. What is the minimum score that an applicant must make on the test to be accepted?
Mathematics
1 answer:
Butoxors [25]3 years ago
3 0

Answer:

An applicant must score a minimum of 128

Step-by-step explanation:

To solve this question, we make use of the z-score formula.

Z = (X - mean)/standard deviation

Firstly, let’s list out the parameters from the question. From the question, we can deduce that:

Z = 1.5

X = ?

Mean = 110

Standard deviation =12

1.5= (X-110)/12

18 = X - 110

X = 110 + 18

X = 128

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den301095 [7]

Answer:

yes

Step-by-step explanation:

Given

57 < 11x ← substitute x = 8

57 ← 88 ← True

Thus x = 8 is a solution to the inequality

4 0
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A town has a population of 200,000 and decreases at 4.5% every year.what will be the population after 30 years?
sveticcg [70]
ANSWER
= 200000 x (1-4.5%)^30
= 200000 x (1-0.045)^30
= 200000 x 0.955^30
= 50249.43
= <u>50249</u>
4 0
4 years ago
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Please help asap!!! I’ll give you a thank you
stich3 [128]

Answer:

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Step-by-step explanation:

V=a3

7 0
3 years ago
HELP ASAP!!! have a great day!!!
leonid [27]

Answer:

D

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3 0
3 years ago
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Callie's Gym is a complete fitness center. Owner Callie Ducain employs various fitness trainers who are expected to staff the fr
OLga [1]

Answer:

a)Total Labor Cost = $600x + $30y.

b) Total variable cost = $3000.

c) Total labor cost last month = $6000.

d) Unit cost of labor per class = $60.

e) Total variable labor cost = $30 * 150 = $4500, Total Labor Cost = $3000 + $4500 = $7500, and Unit cost of labor per class = $7500/150 = $50.

Step-by-step explanation:

a) It is given that the labor cost includes two components: cost of trainers, which is actually their salaries, and cost of a fitness class taught. Fitness trainer costs $600 and one fitness class costs $30. Assuming there are x number of trainers and y number of classes, therefore the model can be expressed as:

Total Labor Cost = Fitness Trainer Cost * number of trainers + Fitness Class Cost * number of classes.

Total Labor Cost = $600x + $30y.

b) The total variable labor cost will be the cost spent on the number of classes. Since number of classes are 100 and the cost of one class is $30, therefore:

Total variable cost = cost of one class * number of classes.

Total variable cost = $30 * 100.

Total variable cost = $3000.

c) Furthermore, last month, x = 5 and y = 100. Plug these values in the total labor cost equation:

Total labor cost last month = $600(5) + $30(100).

Total labor cost last month = $3000 + $3000.

Total labor cost last month = $6000.

d) The total labor cost is $600. Number of classes are 100. Therefore:

Unit cost of labor per class = Total Labor Cost/Number of classes.

Unit cost of labor per class = $6000/100.

Unit cost of labor per class = $60.

e) If the number of classes are increases by 50%, this means that the number of classes will be 150 instead of 100. Therefore:

Total variable labor cost = $30 * 150 = $4500.

Total Labor Cost = $3000 + $4500 = $7500.

Unit cost of labor per class = $7500/150 = $50!!!

7 0
3 years ago
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