Answer:
The average speed was 48.7 miles per hour.
Step-by-step explanation:
The average speed v is given by the following formula:
[tex]v = \frac{d}{t}[/tex]
In which d is the distance, and t is the time.
The Harrisons drove 304.2 miles in 6.25 hours
This means that [tex]d = 304.2, t = 6.25[/tex]
We have the distance is miles and the time in hours, so the distance is in miles per hour.
So
[tex]v = \frac{304.2}{6.25} = 48.7[/tex]
The average speed was 48.7 miles per hour.