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Suppose the electric company charges 10 cents per kwh. how much does it cost to use a 125 watt lamp 4 hours a day for 30 days
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Feb 7, 2019
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Suppose the electric company charges 10 cents per kwh. how much does it cost to use a 125 watt lamp 4 hours a day for 30 days
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The total time the lamp was on is
Since the power is P=125 W, the total energy consumed by the lamp is
Each 1 kWh costs 10 cents, so the total cost will be
dollars.
MLow
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Feb 11, 2019
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