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The electric company charges 10 cents per kilowatt-hour of electricity used. How much would it cost to run a 100-watt light bulb for 5 hours a day for 30 days?

A. $15
B. $10
C. $5
D. $3

Answer :

Final answer:

The cost of running a 100-watt light bulb for 5 hours a day for 30 days would be $1.50.

Explanation:

To calculate the cost of running a 100-watt light bulb for 5 hours a day for 30 days, we need to determine the total kilowatt-hours (kWh) used. First, we need to convert the wattage to kilowatts: 100 watts = 0.1 kilowatts. Then, we can calculate the total kWh used: 0.1 kilowatts x 5 hours/day x 30 days = 15 kWh.

Next, we can calculate the cost by multiplying the total kWh by the cost per kWh. In this case, the cost is 10 cents per kWh. So, the cost would be 15 kWh x $0.10/kWh = $1.50.

Therefore, the answer is option d) $3 dollars.

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