All about 2 pounds of red beans and one three fourth pounds of green beans and 10 ounces of string at the craft store how much do carla supplies weigh in all

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

Can someone me out here number 4 plz

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)