### Home > PC > Chapter 7 > Lesson 7.3.2 > Problem7-110

7-110.

Find the sum of the following series.

$100 + 100\left(1.005\right) + 100\left(1.005\right)^{2} + … + 100\left(1.005\right)^{11}$

$S_n=\frac{a(r^{n}-1)}{r-1}$

Remember $n$ is the number of terms in the series. For this series $n = 12$.