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what is the cost to run a single 100 w light bulb for 30 days if the electric company charges $0.18 for every KW-hr?​

Sagot :

Explanation:

power of the bulb = 100w=0.1kw

power consumption when the bulb is used for 30 days ( 30 *24 = 720 hours) =0.1*720=72kwh

cost to run the bulb for 30 days = 72*0.18

= $12.96

Answer is $12.96..................

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