What is the end behavior ( and if anyone is good at this can you help me with all 3 problems please)

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?

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

Does the point (1, sqrt 7) lie on circle shown.