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 / 5 = m`

`m = 34`
Seventh Grade:

`112 / 4 = m`

`m = 28`
Eight Grade:

`192 / 6 = m`

`m = 32`
Therefore since the Sixth graders made the most money per hour, they had the highest rate for raising money.