What is the radius of this circle?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

What statement is true? 2x^2-9x+2=-1

Your food costs are $5,500. your total food sales are $11,000. what percent of your food sales do the food costs represent?