Question

The classes at the middle school want to raise money. The sixth grade runs a bake sale for 5 5 hours and makes $170 $ 170 . The seventh grade sets up a dunking booth for 4 4 hours and makes $112 $ 112 . The eighth grade has a car wash and makes $192 $ 192 in 6 6 hours. Which class has the highest rate for raising money? CLEAR CHECK

Answer 1

To find the rates, you need to find out how much money each booth made per hour. You have to calculate how much money they made in one hour.
$m = money \: made \: per \: hour$
Sixth Grade:
$170 \div 5 = m$
$m = 34$
Seventh Grade:
$112 \div 4 = m$
$m = 28$
Eight Grade:
$192 \div 6 = m$
$m = 32$
Therefore since the Sixth graders made the most money per hour, they had the highest rate for raising money.