Gas mileage actually varies slightly with the driving speed of a car​ (as well as with highway vs. city​ driving). Suppose your car averages 33 miles per gallon on the highway if your average speed is 54 miles per​ hour, and it averages 22 miles per gallon on the highway if your average speed is 75 miles per hour. Answer parts​ (a) and​ (b) below.
a. What is the driving time for a 2000​-mile trip if you drive at an average speed of 54 miles per​ hour?
What is the driving time at 75 miles per​ hour?

The driving time at 54 miles per hour is
nothing hours.
​(Type an integer or decimal rounded to two decimal places as​ needed.)
The driving time is at 75 miles per hour is
nothing hours.
​(Round to two decimal places as​ needed.)
b. Assume a gasoline price of ​$3.33 per gallon. What is the gasoline cost for a 2000​-mile trip if you drive at an average speed of 54 miles per​ hour? What is the gasoline cost at 75 miles per​ hour?
The gasoline cost at 54 miles per hour is ​$
nothing.
​(Round to two decimal places as​ needed.)
The gasoline cost at 75 miles per hour is ​$
nothing.
​(Round to two decimal places as​ needed.)