How to solve the equation 44.72=5.2x

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 difference between the predicted value and the actual value

Can someone me with my math problem pls my teacher is on my back about this