Which point is located on the Y-axis?

Which function has the domain x> -11?

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b