Answer:
The correct answer is C.
Explanation:
Because ONE gallon is equal to 33.5 miles, all you have to do is multiply 33.5 by 15.1 to get the number of miles 15.1 gallons holds.
33.5 * 15.1 = 505.85
Therefore, C is the correct answer.
The other answer to this problem is:
John got the wrong answer because he didn't place the decimal point in 15.1. This means he multiplied 151 by 33.5, which is how he got his answer.