Please help me on this question. I forgot how to do it​

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

Aline passes through 3,7 and 6,9 what equation represents the line

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?