How much does it cost to run a700 watt micowave for 17 hours if the power company charges 12 cents per kilowatt hour?

Question

Not sure how to figure this out.

Answer 1

 

a kilowatt hour is 1000 watts for an hour.

 

We have 700 watts = 0.7 kilowatts 

The time is 17 hours

 

So in kilowatt hours this is 0.7*17 = 11.9 kilowatt hours.

 

cost = 11.9 kilowatt hours x  12 cents/kilowatt hour = $1.43