The student council at Oxford High School is making T-shirts to sell for a fundraiser, at a price of $12 apiece. The costs, meanwhile, are $10 per shirt, plus a setup fee of $130. Selling a certain number of shirts will allow the student council to cover their costs. How many shirts must be sold? What will the costs be?

Step-by-step explanation:

First find the profit they will make from each shirt:

= Selling price - Cost price

= 12 - 10

= $2

They need to cover the cost of setting up which is $130. The number of shirts to sell given a profit of $2 from each shirt is:

= 130 / 2

=65 shirts

Cost of selling 65 shirts:

= 65 * 10 per shirt

= $650

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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