Answer:
37.5 miles per hour
Explanation:
To get the average speed, we need to know the number of miles traveled and for how many hours did the car traveled.
We already know the number of hours traveled and this is 14.5 hours. To get the distance traveled, we need to subtract the initial odometer reading from the final odometer reading. This is 21,353 miles - 20,809 miles = 544 miles
The average speed is thus distance/time = 544/14.5 = 37.52 approximately 38 miles per hour