Chapter 1, Problem 14PE

Automobiles have different fuel economies (mpg), and commuters drive different distance to work or school. Suppose that a state Department of Transportation (DOT) is insterested in measuring the average monthly fuel consumption of commuters in a certain city. The DOT might sample a group of commuters and collect information on the number of miles driven per day, number of driving days per month, and the fuel economy of their cars. Develop a predictive model for calculating the amount of gasoline consumed, using the following symbols for the data. $\begin{array}{l}\begin{array}{l}G=gallonsoffuelconsumedpermonth\hfill \\ m=milesdrivenperdaytoandfromworkorschool\hfill \\ d=numberofdrivingdayspermonth\hfill \end{array}\\ f=fueleconomyinmilespergallon\end{array}$ Suppose that a commuter drives 30 miles round trip to work 20 days each month and achieves a fuel economy of 34 mpg. How many gallons of gasoline are used?