What is 20/8 equivalent to?

Volume of a cylinder with a radius of 13 in and height of 30 in

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.