# How much must you invest at one time in order to accumulate $18,000 in 12 years at 5% annual interest?

##### 1 Answer

Jan 6, 2018

#### Answer:

Use the geometric sequence formula

#### Explanation:

We can solve this problem by using the formula

where tn is general term, t1 is the first term of the sequence, r is the common ratio, and n is the number of terms.

By plugging the values we have into the formula we'll see that:

The answer is $10,023.1