14/5 is what as an improper fraction

Which value of c would make he following expression completely factored? 8x+cy

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Ineed here’s a picture of the question