Find (4x10^5)-(9x10^2)

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.

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Issof claims that the scale factor is 1/2. which statement about his claim is correct