The monthly (30 days) electric bill included the cost of running a central air-conditioning unit for 2.0 hr/day at 5000 W, and a series connection of ten 60 W light bulbs for 5.0 hr/day
How much did these items contribute to the cost of the monthly electric bill if electricity costs 8.0¢ per kWh? A)
$21.30
B)
$39.50
C)
$31.20
D)
$13.20
E)
$12.30
C
Physics & Space Science
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