The gas mileage M (in mi/gal) of a car is modeled by M = N/G, where N is the number of miles driven and G is the number of gallons of gas used. (a) Find the gas mileage M for a car that drove 240 mi on 8 gal of gas. (b) A car with a gas mileage M 25 mi/gal is driven 175 mi. How many gallons of gas are used?

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