# In 1999 the worlds population reached 6 billion an was increasing at a rate of 1.3% per year. Assume that this growth rate remains constant, how do you write a formula for the world population (in billions) as a function of the number of years since 1999?

##### 1 Answer

Jul 31, 2016

Population

Where

#### Explanation:

Since

we can write the equation

Population

Where

Assuming we want to know the population in the year

from the above equation

So

Population in the