Val's whole-house central air conditioner uses 3,500 watts when running. Val runs the AC 5 hours per summer day. Electricity costs (10 cents)/(1 kilowatt-hour). How much does Val's AC cost to run for a summer month of 30 days?

$52.50.

Step-by-step explanation:

Since Val's air conditioner uses 3,500 watts when running, and that Val uses it for 5 hours during summer days, spending 10 cents per kilowatt hour, determining how much money Val will spend during a 30-day summer must be done the following calculation:

3,500 watts = 3.5 kilowatts

3.5 kilowatts per hour = 35 cents

35 cents x 5 hours = 175 cents per day

175 cents per day x 30 days = 5250 cents per month

5250/100 = X

52.5 = X

Thus, during 30 days of summer, Val will spend $ 52.50 on electricity from the use of his air conditionier.

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