Please, please help (if you can)

A population of bacteria increases by 30 every hour. Is this situation linear or exponential?

What 620000 divided by 10 to the third power

Out of five men and five women, we form a committee consisting of four different people. assuming that each committee of size four is equally likely, find the probabilities of the following events: 1. the committee consists of two men and two women 2. the committee has more women than men. 3. the committee has at least one man. for the remainder of the problem assume that alice and bob are among the ten people being considered. 4. both alice and bob are members of the committee.

What is the distributive prperty to exspress 24+36