I’m confused with this

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°

Factor the polynomial, if possible. if the polynomial cannot be factored, write prime. 9n^3 + 27n^2 – 25n – 75

Arestaurant added a new outdoor section that was 8 feet wide and 6 feet long. what is the area of their new outdoor section