Suppose your car averages 38 miles per gallon on the high- way if your average speed is 55 miles per hour, and it aver-
ages 32 miles per gallon on the highway if your average speed
is 70 miles per hour.
a. What is the driving time for a 2000-mile trip if you drive
at an average speed of 55 miles per hour? What is the driving
time at 70 miles per hour?
b. Assume a gasoline price of $2.55 per gallon. What is the
gasoline cost for a 2000-mile trip if you drive at an average
speed of 55 miles per hour? What is the gasoline cost at
70 miles per hour?

Some one please help me on these questions! They’re getting a little harder now!!