Helppp im dead its so hard

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 these triangle pairs can be mapped to each other using two reflections?

Write the expression as a single natural logarithm. 2 in a - 4 in y