Need a hand btw, Dana is ignoring me;)

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?

Find the zeros of the function. write the smaller solution first, and the larger solution second f(x)= (x+6)^2-49

What is the order of magnitude for the number of liters in a large bottle of soda served at a party