help with grade 9 science/math question ?

Heyhey

New member
A kitchen clock is usually left on all day. It has a power rating of 4 watts. With the cost of electricity, in Alberta, $0.11 per kilowatt hour, what is the cost of operating the clock for one year?
A. $ 385.44
B. $ 38.54
C. $ 3.85
D. $ 0.39

I really don't understand how to do this.
if you know the answer, please explain how you solved it ! :)
 
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