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
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.
