How much does it cost to operate five 80-watt light bulbs for 24 hours at a rate of 5 cents per kWh?
A)96 cents
B)83 cents
C)0.48 cents
D)48 cents
E)9.6 cents

Question

Quizplus · Accepted Answer

First, we need to calculate the total energy consumed by the five 80-watt light bulbs in one day:

Total watts = 5 bulbs x 80 watts/bulb = 400 watts
Total energy consumed in 24 hours = 400 watts x 24 hours = 9600 watt-hours or 9.6 kilowatt-hours (kWh)

Next, we need to calculate the cost of 9.6 kWh at a rate of 5 cents per kWh:

Cost = 9.6 kWh x $0.05/kWh = $0.48 or 48 cents

Therefore, the best answer is D, 48 cents.

How Much Does It Cost to Operate Five 80-Watt Light