Chloe lives in an area where she runs the air conditioner during the 4 hottest months of the year. The air conditioner runs for 7 hours per day at a cost of 21 cents per hour. How much does she spend per year on utility bills for the air conditioner?(Assume there are 30 days in each month)
a.

$705.60
b.

$588.00
c.

$216.09
d.

$176.40

Question

Chloe lives in an area where she runs the air conditioner during the 4 hottest months of the year. The air conditioner runs for 7 hours per day at a cost of 21 cents per hour. How much does she spend per year on utility bills for the air conditioner?(Assume there are 30 days in each month)
a.
	
$705.60
b.
	
$588.00
c.
	
$216.09
d.
	
$176.40

anonymous · Answer

4 months, each month is 30 days. 30*4=120
She has the AC on for 120 days.
Each day, she has the AC on for 7 hours. 7*120=840 total hours Chloe's AC is on in a year.
AC costs 21 cents per hour. Remember, 21 cents would be written as $0.21, not $21! 
840*0.21=$176.40 spent on AC per year