Answer:
The mean rate of the racer is 153.8 mph.
Explanation:
It took a race car driver 3 hours and 15 minutes to go 500 miles.
Now converting 3 hours and 15 minutes to hours.
15 minutes =
hours
Now, we have that it took a race car driver 3.25 hours to go 500 miles.
So, the average speed will be =
=153.8 mph
Hence, the mean rate of the racer is 153.8 mph.