I need help answering the question

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

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

Xto the second power plus 14x plus 48. what are the factors? we are doing factoring trinomials with a=1