Which pairs of numbers are relatively prime? Check all that apply. 9 and 15
9 and 40
9 and 21
15 and 21
21 and 40

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