The Harrisons drove 304.2 miles in 6.25 hours. What was their average speed, to the nearest tenth?

The average speed was 48.7 miles per hour.

Step-by-step 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.

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it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.