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3 March, 15:37

If electricity costs 5 cents per kilowatt-hour, how much does it cost to run an 80-watt light bulb for 24 hours?

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  1. 3 March, 18:57
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    80 watts by 60 minutes is 4800 watts

    4.8 kw

    4.8 times 24 is 115.2 kw

    115.2 kw times 5 cents is 576 cents

    5.76 dollars
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