Question

Find the volume of the solid obtained by rotating the region bounded by y=x^2, y=1, and the y-axis about the line y= -3

Answer 1

is that a paraboloid ring?

Answer 2

its a washer method, simply becasue we are cutting out the middle; might as well call it the donut method

Answer 3

lets add 3 to make life easier;

y = x^2 +3; and y = 1+3 = 4