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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

Respuesta :

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.
[tex]m = money \: made \: per \: hour[/tex]
Sixth Grade:
[tex]170 \div 5 = m[/tex]
[tex]m = 34[/tex]
Seventh Grade:
[tex]112 \div 4 = m[/tex]
[tex]m = 28[/tex]
Eight Grade:
[tex]192 \div 6 = m[/tex]
[tex]m = 32[/tex]
Therefore since the Sixth graders made the most money per hour, they had the highest rate for raising money.