Answer:
1.33 hours(If it doesn't let you type that in, just do 1 hour for rounding purposes)
Explanation:
First, we take the 350 gal variable and divide that by 4.39, we now get 79.73
Now, we convert that into hours(60mins per hour), so 79.73 divided by 60.
We get 1.33, which is your answer!