1. Kristin is driving on the highway at 60 miles per hour. How long will it take Kristin to reach a rest area 90miles away?

1.5 hours
60 mph
We know D = RT
Where
D is distancce
R is rate
T is time
time we need for 90 miles:
D = RT
90 = 60T
T = 90/60
T = 1.5 hours