A typical cost for electrical power is $0.120 per kilowatthour. Some people leave their porch light on all the time. What isthe yearly cost to keep a 75 W bulb burning day and night?
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A typical cost for electrical power is $0.120 per kilowatthour. Some people leave their porch light on all the time. What is
the yearly cost to keep a 75 W bulb burning day and night?
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