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Mathematics, 08.10.2019 00:20, anonymous1813
(power and energy) if electricity costs $0.09 per kilowatt hour, find the cost (in dollars) of running each of the following electrical devices six hours per day for 30 days:
a. a 60 watt incandescent light bulb
b. an led light bulb that emits the same light intensity as a 60 w incandescent light bulb, but uses 80 ma from a 120 v residential power wall outlet
c. a 1500 w electric space heater that runs continuously over the six-hour daily period
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