High School

A town has a population of 141,300 and grows at a rate of [tex]$5\%$[/tex] every year. Which equation represents the town's population after 6 years?

A. [tex]$P = 141,300(1 + 0.05)^6$[/tex]

B. [tex]$P = 141,300(0.95)^6$[/tex]

C. [tex]$P = 141,300(0.05)^6$[/tex]

D. [tex]$P = 141,300(1 - 0.05)^6$[/tex]

Answer :

We are given an initial population of
[tex]$$P_0 = 141300$$[/tex]
and an annual growth rate of
[tex]$$5\% = 0.05.$$[/tex]

When a quantity grows by a fixed percentage every year, the formula to calculate the population after [tex]$t$[/tex] years is given by
[tex]$$P = P_0 (1 + r)^t,$$[/tex]
where [tex]$r$[/tex] is the annual growth rate.

Here, we substitute the values:
- [tex]$P_0 = 141300$[/tex]
- [tex]$r = 0.05$[/tex]
- [tex]$t = 6$[/tex]

This gives
[tex]$$P = 141300 \times (1 + 0.05)^6 = 141300 \times (1.05)^6.$$[/tex]

Calculating the exponentiation results in
[tex]$$P \approx 141300 \times (1.05)^6 \approx 189355.51402031255.$$[/tex]

Thus, the equation that represents the town's population after 6 years is
[tex]$$\boxed{P = 141300(1.05)^6}.$$[/tex]