The population in Zanzibar doubles every year. Currently there are 157634 people. Write a function of this growth.

To write a function that represents the population growth in Zanzibar, we can use the concept of exponential growth, where the population doubles every year. The general formula for exponential growth is:

P(t) = P(0) * (1 + r)^t

Where:
- P(t) represents the population at time t
- P(0) represents the initial population
- r represents the growth rate (in decimal form)
- t represents the time in years

In this case, the growth rate is 2 (as the population doubles every year), and the initial population is 157,634.

Therefore, the function that represents the population growth in Zanzibar would be:

P(t) = 157,634 * (2)^t

Where t represents the number of years from the start.