What is the angle of elevation to a building 1300m away that is 250m high? •79.1°
•78.9°
•11.1°
•10.9°

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.

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a. p.

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)