Can someone please answer this I have been having trouble with this question all day.

Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.

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

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3