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10 May, 07:49

In an area in which electricity costs 8 cents/kilowatt-hour, a 5 kW clothes dryer runs for 90 minutes to dry a load of laundry. How much did it cost to dry these clothes?

A. $0.20

B. $0.30

C. $0.45

D. $0.60

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Answers (1)
  1. 10 May, 08:04
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    D $0.60 because (5kW) x (90/60hours) x (8cents/kWh) = $0.60 - - > D
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