To find the mileage per gallon (miles per gallon, or mpg), you can use the formula:
\[ \text{mpg} = \frac{\text{total miles driven}}{\text{gallons of gas used}} \]
In this case, Mr. Anderson drove 522 miles and used 15.35 gallons of gas. Plugging in the numbers:
\[ \text{mpg} = \frac{522 \text{ miles}}{15.35 \text{ gallons}} \approx 34.00 \text{ mpg} \]
So, rounding up, the mileage per gallon for Mr. Anderson is approximately 34.01 mpg.
Therefore, the correct response is:
34.01 mpg.