Question

Keith is driving on a highway. He uses one gallon of gas every 25 miles he drives. The distance, D (in miles), he travels on g gallons of gas is given by the following function. D (g) = 25g How far does Keith drive if he uses 4 gallons of gas?

Answer 1

To find out how far Keith drives using 4 gallons of gas, you can use the function given:

\[ D(g) = 25g \]

Now, substitute \( g = 4 \) into the function:

\[ D(4) = 25 \times 4 \]

Calculating this gives:

\[ D(4) = 100 \]

So, if Keith uses 4 gallons of gas, he drives **100 miles**.