Gas mileage actually varies slightly with the driving speed of a car as well as with highway vs city driving Suppose your car averages 27 miles per gallon on the highway if your average speed is 52 miles per hour and it averages 26 miles per gallon on the highway if your average speed is 68 miles per hour Answer parts a and b below C a What is the driving time for a 2900 mile trip if you drive at an average speed of 52 miles per hour What is the driving time at 68 miles per hour The driving time at 52 miles per hour is hours Type an integer or decimal rounded to two decimal places as needed