Physics WebAssign Ch17 #9

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If electrical energy costs 12 cents, or $0.12, per kilowatt-hour, then what would the following events cost?

(a) burning a 40 W light bulb for 24 h straight
$_____

(b) operating an electric oven for 4.0 h if it carries a current of 20.0 A at 220 V
$_____