Just answer the question i'll mark you the brainlest. Simplify. Show all steps for full credit. Circle your final answer. (4 points)

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.

Clara schumann is buying bagels for her coworkers, she buys a dozen bagels priced at $5.49 a dozen. the bakery's cost for making the bagels is $2.25 per dozen. what is the markup rate based on selling price on a dozen bagels?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)