# The population of Bridgeville, PA, is 5,300 with a growth rate of 1.3% per year. Which expression could be used to estimate the population of Bridgeville t years from now?

Dec 16, 2016

$P A = 5300 {\left(1 + 1.3\right)}^{t}$

However, this equation does not take into account the death rate.

#### Explanation:

Let population be PA

Use the same equation they use to calculate compound interest

Principle sum is what you start with:$\to P$

So we have: $\to P {\left(1 + \frac{1.3}{100}\right)}^{t}$

But $P = 5300$ giving:

$P A = 5300 {\left(1 + 1.3\right)}^{t}$