Pls help this question is way to hard

Which formula gives the area of a triangle? a=1/2(b+h)

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 9 + 12x + 4x^2