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(The conversion factor is 1 kilowatt/ 1000 watts) 4c) If you use the heater for . 5 hours, how much energy will you use? P (in kilowatts) = E = t = 4d) If the cost of using the heater is . $0.05. per kilowatt•hour, how much will it cost to use the heater for 5 hours? ................
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