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=

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 \[ F V=\$ \]
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Solution

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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}\\).

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