# Math Help - Population Growth

1. ## Population Growth

The population of the world was approximately 6.3 billion in July 2003. Assuming that the population will grow by 2% each year, estimate the following.

In what year will the population of the world double?

2. The model you need is

$P = 6,300,000,000\times 1.02^t$ where P is population and t is years.

You need to solve for t when P has doubled i.e. 12,600,000,000.

So $12,600,000,000 = 6,300,000,000\times 1.02^t$

$2 = 1.02^t$ Can you solve it from here?

Spoiler:
I get t = 35

3. yep i got it! thanks!