What is the surface area of this design?

The formula for the volume of a rectangular prism is v = lwh. a rectangular prism has a length of 2y 3 and width of 5y. the volume of the prism is 20y 10 + 70y 4 . what is the height of the prism? show your work.

What is the smallest integer n such that n\sqrt{2} is greater than 20

Graph the system: f(x)= 3/x-2; f(x)= 1/2x + 2