I have this problem

find the voulme of the solid bounded above by surface z=50-4(y^2)

and below by z=9(y^2)+14

I only know how to calculate voules of solid when the side parameters are given(eg. bounded on sides by cylinder x^2+y^2=1)

but i dont know how to apply the double integral for solid bounded by two surfaces.

I would be grateful if someone can answer how to do it(or point to some website where it is clearly shown)

thanks in advance