A fidget spinner is being sold in a store for $140.35 and has been marked up 7%. How much did the store pay for the fidget spinner? a. $131.16
b. $130.00
c. $155.17
d. $133.35

You will get 25 points an image of a rectangular prism is shown below: part a: a cross section of the prism is cut with a plane parallel to the base. what is the name of the shape created by the cross section? explain your answer. (5 points) part b: if a cross section of the prism is cut perpendicular to the base, what would be the shape of the resulting cross section? explain your answer. (5 points)

Can someone check my answer? you : )

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.