Answer:he used 0.38 gallons if gas for each time.
Explanation:
The total number of gallons of gas that Mr Dodd used to fill the gas tank on his lawnmower is 3.8
He mowed his yard 10 times on the same tank of gas.
If he used the same amount of gas each time, it means that the amount of gas that he used for each of the time would be
3.8/10 = 0.38 gallons of gas