A 20 question multiple choice test is given to someone who randonly guesses at all 20 questions. If each question has four answer choices, what us the expected number the person will asnwer correctly?​

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.

Sketch the region enclosed by the given curves. decide whether to integrate with respect to x or y. draw a typical approximating rectangle and label its height and width. y= 5x, y=7x^2then find the area s of the region.

Fast! find the length of cu. the triangles are similar. show your work.