Hi i have answers but i don't have the workings can someone help lol

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

Which of the following is the result of expanding the series

Atemperature of 1.64◦f corresponds to answer in units of ◦c.