Someone please help I'm struggling even though its easy:(

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.

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

How many solutions does the nonlinear system of equations graphed bellow have?