Calculate the area of this quadrilateral.
can someone help me please?!​

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)

Write 17/20 as a decimal and as a percent.

Me i’m stuck on all these questions besides the two bottom ones