Answer:
35 miles per gallon
Step-by-step explanation:
Here we know that the car driven 402.5 miles on 11.5 gallons of gas, so we can write the following equivalence:
402.5 m = 11.5 g
With m being miles and g gallons.
We want to know the equivalent of miles for 1 gallon. So, lets take the equivalence and divide it by 11.5
402.5/11.5 m = 11.5/11.5 g
35 m = 1g
So, each gallon permits to travel 35 miles. If you want to verify it, just multiply 11.5 (the gallons) g by the number of miles, 35:
11.5 * 35 = 402.5
