Help please I’m so confused

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 total surface area of this square pyramid?

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8