Does anyone want to make an ap3x study group to help each other out!?!?!?!?? pls !!

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

How do you determine if an ordered pair is a solution to a given equation?

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?