A washing machine uses 1.8 × 105 watts of power. If it is in use for 2 hours per day (on average), how many kilowatt hours will it use in 30 days?
A. 1,100 kilowatt hours
B. 36 kilowatt hours
C. 18 kilowatt hours
D. 540 kilowatt hours
E. 1.1 × 106 kilowatt hours

Question

A washing machine uses 1.8 × 105 watts of power. If it is in use for 2 hours per day (on average), how many kilowatt hours will it use in 30 days?
A. 1,100 kilowatt hours
B. 36 kilowatt hours
C. 18 kilowatt hours
D. 540 kilowatt hours
E. 1.1 × 106 kilowatt hours

espex · Answer

Take your rating, multiplied by the amount of hours per day, multiplied by the number of days. Then convert your answer to kilo (10^3) and you're done.

anonymous · Answer

If i get 10800000 before converting , how do i convert it?

espex · Answer

You will move the decimal place to the left.

anonymous · Answer

Its not one of the answers though..

espex · Answer

Sorry, something came up.

anonymous · Answer

its ok. Do u get my other question?

anonymous · Answer

A toaster is plugged into an 120-volt outlet. If it has a resistance of 460 ohms, how much power does it use?
A. 1,800 watts
B. 3.8 watts
C. 31 watts
D. 55,000 watts
E. 340 watts

espex · Answer

Your second question uses P=V^2/R