The ratio of 600m to 3km in simplest form

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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.

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.