Just two algebra questions. you : )

What is the solution to the equation 9^(x+1) =27

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.

Extra points! find the missing dimension! need asap