What is annual cost of operation

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The common cost of electric power is $ 0.120 (dollars) per kilowatt-hour. to some People always keep a lamp on near the front door. What is the costannual to have a 75 W light bulb on day and night?

b) Suppose your refrigerator uses 400 W of power when it is in operation, and it works 8 hours a day. What is your annual cost of operation?

Reference no: EM132536653

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