Answer:
The average speed was 48.7 miles per hour.
Explanation:
The average speed v is given by the following formula:
In which d is the distance, and t is the time.
The Harrisons drove 304.2 miles in 6.25 hours
This means that
We have the distance is miles and the time in hours, so the distance is in miles per hour.
So
The average speed was 48.7 miles per hour.