Help on three and four please

Answer:
20.4 mpg
Step-by-step explanation:
To find gas milage you simply do the # of miles divided by the # of gallons:
# of Miles= 306
# of Gallons= 15
You do [tex]\frac{306}{15}[/tex] and then you would get the answer of 20.4.
So your final answer will be 20.4 mpg
Hope that helped!