What is the correct label of the parallel lines?

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

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?