Ineed with these two limit problems. first one has continuous functions, second one involves factorization (i got 4/5 for the problem in the second picture, but it's apparently wrong.)

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?

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0

3women sell hats at a craft fair weekly. the money they make at the fair is split into categories. 9% goes to pay taxes. $55 goes to pay rent for the space they sell in. the rest is split between the women. if the group make $706 at the fair, how much does each women get paid once the money is divided