Question 33 • Financial Math - MA2007
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.
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