Question

kevin is looking at two brands of washing machines. between water and electricity, a brand c washer uses about $0.65 per load, and a brand d washer uses about $0.27 per load. kevin averages about five loads of laundry per month. after one year, how much more would the utility costs for a brand c washer be than the utility costs for a brand d washer?
a. $22.80
b. $16.20
c. $7.60
d. $19.00

Explanation:

Calculate the cost difference per load

Using the Operating Cost Analysis knowledge point

$$ \Delta C_{\text{load}} = \$0.65 - \$0.27 = \$0.38 $$

Determine the total number of loads per year

Using the Operating Cost Analysis knowledge point

$$
LATEXBLOCK0
$$

Calculate the total annual utility cost difference

Using the Operating Cost Analysis knowledge point

$$ \Delta C_{\text{annual}} = 60 \times \$0.38 = \$22.80 $$

Answer:

• a. $22.80 (Correct answer)
• b. $16.20
• c. $7.60
• d. $19.00