PLZ HELP ME ITS FOR ALGEBRA

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

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

According to the data set, where should the upper quartile line of the box plot be placed?