Function for the given x value f(x)=x-3, x=-2

The function f(x) = 14,600(1.1)* represents the population of a town x years after it was established. what was the original population of the town?

Aball is dropped from a height of 10m above the ground. it bounce to 90% of its previous height on each bounce. what is the approximate height that the ball bounce to the fourth bounce?

This is about circle theorems. someone asap : (