Question: A standard flashlight battery can deliver about 4 . 6 W - h of energy before it runs down. ( a ) If a battery

A standard flashlight battery can deliver about 4.6 W-h of energy before it runs down. (a) If a battery costs 80 cents, what is the cost in dollars of operating a 100 W lamp for 7.3 h using batteries? (b) What is the cost in dollars if power is provided at the rate of 6.0 cents per kilowatt-hour?

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