Jimenez Medina
07/18/2024 · High School
Gray invested \( \$ 9000 \) four times a year in an annuity due ecurities for a period of 2 years at an interest rate of \( 8 \% \) unded quarterly. Using the ordinary annuity table, calcu alue of the annuity due at the end of the 2 -year period.
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Step-by-step Solution
To calculate the future value of an annuity due, we can use the formula for the future value of an annuity due, which is given by:
\[
FV = P \times \left( \frac{(1 + r)^n - 1}{r} \right) \times (1 + r)
\]
Where:
- \( FV \) = future value of the annuity due
- \( P \) = payment amount per period
- \( r \) = interest rate per period
- \( n \) = total number of payments
### Given:
- \( P = 9000 \) (the amount invested each quarter)
- Annual interest rate = \( 8\% \) or \( 0.08 \)
- Since the interest is compounded quarterly, the quarterly interest rate \( r \) is:
\[
r = \frac{0.08}{4} = 0.02
\]
- The total number of payments over 2 years, with 4 payments per year, is:
\[
n = 2 \times 4 = 8
\]
### Step 1: Calculate the future value of the annuity due
Substituting the values into the formula:
\[
FV = 9000 \times \left( \frac{(1 + 0.02)^8 - 1}{0.02} \right) \times (1 + 0.02)
\]
### Step 2: Calculate \( (1 + 0.02)^8 \)
\[
(1 + 0.02)^8 = 1.02^8 \approx 1.171659
\]
### Step 3: Calculate \( \frac{(1.171659 - 1)}{0.02} \)
\[
\frac{(1.171659 - 1)}{0.02} = \frac{0.171659}{0.02} \approx 8.58295
\]
### Step 4: Calculate the future value
Now substituting back into the future value formula:
\[
FV = 9000 \times 8.58295 \times 1.02
\]
Calculating \( 9000 \times 8.58295 \):
\[
9000 \times 8.58295 \approx 77246.55
\]
Now multiplying by \( 1.02 \):
\[
FV \approx 77246.55 \times 1.02 \approx 78791.86
\]
### Conclusion
The future value of the annuity due at the end of the 2-year period is approximately:
\[
\boxed{78791.86}
\]
Quick Answer
The future value of the annuity due at the end of the 2-year period is approximately \$78791.86.
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