Pls help me i will mark you brilliant

Acylinder has volume 45π and radius 3. what is it’s height?

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 solution to the division problem below x3+x2-11x+4/x+4