Can somebody me answer question 16 and correct me if i am wrong on question 15 because i am very lost and confused

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

Match each function with its rate of growth or decay

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.