Answer: 28 miles per gallon.
Explanation:
Hi, to answer this we simply have to divide the miles driven by Chad (308 miles ) by the number of gallons used (11 gallons).
Mathematically speaking:
308 miles / 11 gallons =28 miles per gallon
Chad's car gets 28 miles per gallon.
Feel free to ask for more if needed or if you did not understand something.