Can someone help me with this

What is the volume of this square pyramid?

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

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?