Questions: Find the amount accumulated FV in the given annuity account. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest ten dollars.)
400 deposited monthly for 20 years at 2% per year
FV=
Transcript text: Find the amount accumulated $F V$ in the given annuity account. (Assume end-of-period deposits and compounding at the same intervals as deposits. Round your answer to the nearest ten dollars.)
$\$ 400$ deposited monthly for 20 years at 2\% per year
\[
F V=\$
\]
Solution
Solution Steps
Step 1: Given Values
We are given the following values for the annuity:
Monthly deposit: \( P = 400 \)
Annual interest rate: \( r = 0.02 \)
Number of years: \( t = 20 \)
Step 2: Convert Annual Interest Rate to Monthly Interest Rate
To find the monthly interest rate, we divide the annual interest rate by 12:
\[
r_{monthly} = \frac{r}{12} = \frac{0.02}{12} = 0.0016666666666666668
\]
Step 3: Calculate Total Number of Deposits
The total number of deposits over 20 years, with monthly deposits, is:
\[
n = t \times 12 = 20 \times 12 = 240
\]
Step 4: Future Value of the Annuity
Using the future value of an annuity formula:
\[
FV = P \times \left( \frac{(1 + r_{monthly})^n - 1}{r_{monthly}} \right)
\]
Substituting the values:
\[
FV = 400 \times \left( \frac{(1 + 0.0016666666666666668)^{240} - 1}{0.0016666666666666668} \right)
\]
Calculating this gives:
\[
FV \approx 117918.73374386992
\]
Step 5: Round the Future Value
Rounding the future value to the nearest ten dollars:
\[
FV_{rounded} = 117920.0
\]
Final Answer
The amount accumulated in the annuity account is \\(\boxed{117920}\\).