Please need help look at image 100 points

Iam so stuck. what is the worked out answer for this 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?

Which of the binomials below is a factor of this trinominal? x^2-13+30