A warren of rabbits has a population of 25. The population is increasing at a rate of 20% per year. How can you write an exponential growth function to show the monthly growth rate? Express the growth rate to the nearest ten-thousandth.

A warren of rabbits has a population of 25. The population is increasing at a rate of 20% per year. How can you write an exponential growth function to show the monthly growth rate? Express the growth rate to the nearest ten-thousandth.