Which answer choice is it? Please help and thanks in advance.

Find the volume of the described solid.the solid lies between planes perpendicular to the x-axis at x = 0 and x=7. the cross sectionsperpendicular to the x-axis between these planes are squares whose bases run from the parabolay=-31x to the parabola y = 30/x.a) 441b) 147c) 864d) 882

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x