The formula for compound interest is [tex]A=p(1+\frac{r}{n})^n^t[/tex], where p is the principal that is invested, r is the percentage written as a decimal number, n is the number of times it is compounded per year, and t is the
number of years.
Substituting our information we have:
[tex]A=1000(1+\frac{0.1}{1})^1^*^1^8
\\ = 1000(1+0.1)^1^8
\\ = 1000(1.1)^1^8=5560[/tex]
If she does not touch the money in the account, she will have $5560 after 18 years.
