Number of cars washed by the eight teams per hour = 2 * 8 = 16 cars.
Number of cars washed by the eight teams in 5 = 16 * 5 = 80 cars.
The teams should charge $600/80 = $7.50
Answer:
12
Step-by-step explanation:
The average is calculated as
average =
=
=
= 12
10%
This is because mr Matthews added only 10% to the 80 pounds