Question

About three hours into a fundraising car wash, the Mathletes Club earned $240 washing 48 cars. How much was charged for each carwash? How many more cars will they have to wash to reach their goal of earning $400?

a) Each carwash was charged at $5, they need to wash 30 more cars.
b) Each carwash was charged at $10, they need to wash 16 more cars.
c) Each carwash was charged at $8, they need to wash 20 more cars.
d) Each carwash was charged at $12, they need to wash 20 more cars.

Answer 1

Each carwash was charged at $5 and they need to wash 30 more cars.

Step-by-step explanation:

To find out the amount charged for each carwash, we need to divide the total earnings by the number of cars washed. The Mathletes Club earned $240 washing 48 cars, so each carwash was charged at $240/48 = $5.

To determine how many more cars they need to wash to reach their goal of earning $400, we first subtract the amount they have already earned ($240) from the goal amount ($400). This gives us $400 - $240 = $160. Then, we divide this remaining amount by the cost of each carwash ($5) to find out the number of cars they need to wash: $160/$5 = 32 cars.

Therefore, the correct answer is option a) Each carwash was charged at $5, and they need to wash 30 more cars.