Question

How long should Bill's boss plan for him to cover an 8.9 mile route if Bill averages 2.1 mph?
Round to the nearest tenth if necessary.

Answer 1

average speed = distance/time
v = d/t
Solving for t, you get:
t = d/v
time = distance/average speed

Answer 2

so how do you do it ?

Answer 3

Divide the distance by the average speed.