# A small country that had 20 million people in 1990 has experienced exponential growth in population of 4% per year since then. How do you write an equation that models this situation and use your equation to determine when the population will double?

##### 1 Answer

Feb 19, 2016

#### Explanation:

Population is 20 million people in 1990 and growth in population of 4% per year. Hence, after

Hence,

If it doubles in x years,

Hence