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A 120V air conditioning system draws 15A of current. If it operates for 20 min, a) how much power does it consume in kilowatt-hours? b)

A 120V air conditioning system draws 15A of current. If it operates for 20 min, a) how much power does it consume in kilowatt-hours? b) If the cost of electricity is $0.15/kWh, what is the cost (to the nearest penny) of operating the unit for 20 min?

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