NEED HELP FAST, there is a picture it says find X ans round to the nearest 10th

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.

Acylinder and its dimensions are shown. which equation can be used to find v, the volume of the cylinder in cubic centimeters?

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)