A 100-watt light bulb is left on for 10 hours. Electricity is 10 cents per kilowatt-hour. How much did it cost to operate the light bulb?

A 100-watt light bulb is left on for 10 hours. Electricity is 10 cents per kilowatt-hour. How much did it cost to operate the light bulb?
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ANSWER: 10 CENTS
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