How do you find the volume of this figure? do you count the part where the space is empty?

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!

What is the y-intercept of the line given by the equation

8.74 rounded to the nearest whole number