A car wash detailed 217 cars in 7 hours. At what rate did the car wash detail cars in cars per hour?

31 cars per hour

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To find the rate at which the car wash detailed cars in cars per hour, we need to divide the total number of cars detailed by the total number of hours it took. In this case, the car wash detailed 217 cars in 7 hours.

So, to find the rate, we divide the number of cars (217) by the number of hours (7):

Rate = Number of cars / Number of hours
Rate = 217 cars / 7 hours

Now, we can calculate the rate:

Rate = 31 cars per hour

Therefore, the car wash detailed cars at a rate of 31 cars per hour.