A car that gets m miles per gallon: The cost of operating a car depends on the gas mileage m that your car gets, the cost g per gallon of gasoline, and the distance d that you drive.
a. How much does it cost to drive 100 miles if your car gets 25 miles per gallon and gasoline costs 289 cents per gallon?
b. Find a formula that gives the cost C as a function of m, g, and d. Be sure to state the units of each variable.
c. Use functional notation to show the cost of driving a car that gets 28 miles per gallon a distance of 138 miles if gasoline costs $2.99 per gallon. Use the formula from part b to calculate the cost.
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