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Fred and Carrie's Research Report

Washing Machine and Formula Information

Fred and Carrie

are thinking of purchasing washing machines that have a 20-pound capacity, meaning that each machine can hold 20 pounds or less. The inequalities below demonstrate the number of machines needed, based on the number of pounds of laundry a customer brings in (n.)

M= number of washing machines needed

n= number of pounds of laundry

           1 if  0 < n ≤ 20

           2 if 20 < n ≤ 40

M =     3 if 40 < n ≤ 60

           4 if 60 < n ≤ 80

           5 if 80 < n ≤ 100


Fred and Carrie expect each load of laundry to cost them $0.97.

Formula for cost per load (c) = .97*M

Fred and Carrie plan to charge customers $12.00 per load.

Formula for sales (s) = $12*M

Profit is calculated by subtracting all costs from sales.

Formula for profit per customer (P) = s-c

Estimation and Reasonableness

This section focuses on estimation and reasonableness. Use estimation and rounding for each of the questions in this section (numbers 1, 2 and 3).

Fred and Carrie have two goals:

●     Sell $2,500 or more per week.

●     Spend $250 or less per week.

1.  Are their goals reasonable? Why or why not? Be sure to show your work.

Yes, these goals are both reasonable


The first goal to sell $2,500 or more per week.

Goal 1. (P) = s-c, P = $12 - $1 = $11       (the .97 is rounded up to 1)

             $2,500/$11 = 230 loads per week, (the 226 .65 is rounded up to 230)

             230 * $11 = $2,530 is more than the goal of $2,500

The second goal is to Spend $250 or less per week


Goal 2. So, 230 loads per week with a cost of $1 for every load

$1. * 230 = $230.per week. This is less than $250

For my answers to the first goal, I thinking I should have used another formula. maybe P-c = S

Should I round my answer of 226.65 up to the nearest cent? Would that be 226.70?

Top Answer

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New Doc 2019-10-01 22.00.47_1.jpg

cost ( Spend) per Load = $0.97
St Goal
Revenue ( sales ) per Load = $ 12
ErAt goal is to sell $ 2500 or more per week
As sale of I Load i8 12 so for $ 2500
you have to sell load of
= 208...

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