Last Saturday, Mr. Stone drove 320 miles in 5 hours. What is the unit rate of miles per hour?
60
15
64
80
The unit rate of miles per hour can be found by dividing the total number of miles by the total number of hours. In this case, Mr. Stone drove 320 miles in 5 hours, so the unit rate can be calculated as 320 miles / 5 hours = 64 miles per hour.
Therefore, the unit rate of miles per hour is 64.