In Exercises 67 through 72, write a program to solve the problem and display the answer...

In Exercises 67 through 72, write a program to solve the problem and display the answer in a list box. The program should use variables for each of the quantities.

Gas Mileage A motorist wants to determine her gas mileage. At 23,352 miles (on the odometer) the tank is filled. At 23,695 miles the tank is filled again with 14 gallons. How many miles per gallon did the car average between the two fillings? See Fig. 3.4.