Hey guys what's 2 +1 rally don't know

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

Which of the following best describes the delian problem?

During a wright loss challenge your friend goes from 125 pounds to 100 pounds.what was the percent weight loss