33
QuizMultiple Choice

Home Ownership

Question 33 • Financial Math - MA2007

Li-Mei thinks she can save money on electricity by changing all her bulbs from incandescent bulbs to fluorescent bulbs. Based on the following energy cost table, how much can she save each year if she replaces 8 bulbs? Incandescent bulb - 150 hours monthly use $.05 per hour Fluorescent bulb - 150 hours monthly use $.02 per hour

Answer
A
$36
B
$432
C
$54
D
$1,008

Explanation

Each bulb saves $0.05 − $0.02 = $0.03 per hour. At 150 hours per month for 12 months, that is $0.03 × 150 × 12 = $54 saved per bulb each year. For 8 bulbs, the total savings are $54 × 8 = $432, so the correct choice is $432.

AI-written and checked against the verified answer.

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