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30. how much does it cost to light a 300-w light bulb for 30 days if the cost of electricity is 7 cents per kwh
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30. how much does it cost to light a 300-w light bulb for 30 days if the cost of electricity is 7 cents per kwh

User FlexedCookie
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(0.300 kW) * (24 h/day) * (30 day) * ($0.07/kWh) = $15.12
User Feob
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