According to the rational root theorem, which of the following are possible roots of the polynomial function below? Check all that apply. x^4+ 8x^3 +13x^2-30x-72

A.13
B. 30
C. 8
D. 12

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.