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How much will it cost you (in cents) to operate a 29 Ω electric skillet on a standard 120 V outlet for 5 hours and 36 minutes? The unit price for electrical energy in this case is 7.350 cents/kWh.

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P = E^2/R = 120^2/29 = 497 Watts = 0.497 kW.

Cost = 0.497 * 5.6 * 7.35cents/kWh.

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