Question
6 Formula 1 point You will need to make a payment of \( \$ 4,000 \) ecactly 6 years from today. How much should you deposit today in a bank account that pays an interest rate of \( 7.2 \% \) with annual compounding to ensure you will have enough money to make the future payment? Round your answer to the nearest penny. Type your answer-
Ask by Summers Lang. in the United States
Jan 24,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
You should deposit $2,635.67 today.
Solution
To find out how much you should deposit today in a bank account that pays an interest rate of 7.2% with annual compounding to ensure you will have enough money to make the future payment of $4,000 exactly 6 years from today, we can use the formula for compound interest:
\[ A = P \left( 1 + \frac{r}{n} \right)^{nt} \]
Where:
- \( A \) is the future amount (in this case, $4,000)
- \( P \) is the principal amount (the amount you need to deposit today)
- \( r \) is the annual interest rate (7.2% in this case)
- \( n \) is the number of times the interest is compounded per year (1 for annual compounding)
- \( t \) is the time in years (6 years in this case)
We can rearrange the formula to solve for \( P \) (the principal amount):
\[ P = \frac{A}{\left( 1 + \frac{r}{n} \right)^{nt}} \]
Substitute the given values into the formula:
\[ P = \frac{4000}{\left( 1 + \frac{0.072}{1} \right)^{1 \times 6}} \]
Now, we can calculate the value of \( P \) to determine how much you should deposit today.
Calculate the value by following steps:
- step0: Calculate:
\(\frac{4000}{\left(1+0.072\right)^{6}}\)
- step1: Add the numbers:
\(\frac{4000}{1.072^{6}}\)
- step2: Convert the expressions:
\(\frac{4000}{\left(\frac{134}{125}\right)^{6}}\)
- step3: Simplify the expression:
\(\frac{4000}{\frac{134^{6}}{125^{6}}}\)
- step4: Rewrite the expression:
\(\frac{4000\times 125^{6}}{134^{6}}\)
- step5: Reduce the fraction:
\(\frac{125^{7}}{180916764338}\)
The amount you should deposit today in a bank account that pays an interest rate of 7.2% with annual compounding to ensure you will have enough money to make the future payment of $4,000 exactly 6 years from today is approximately $2,635.67.
Therefore, you should deposit $2,635.67 today in the bank account to ensure you will have enough money to make the future payment of $4,000 exactly 6 years from today.
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The Deep Dive
To find out how much you need to deposit today to reach a future payment of $4,000 in 6 years with an annual interest rate of 7.2%, you can use the formula for present value: \[ PV = \frac{FV}{(1 + r)^n} \] Where: - \( PV \) = Present Value - \( FV \) = Future Value ($4,000) - \( r \) = annual interest rate (7.2% or 0.072) - \( n \) = number of years (6) Plugging in the values: \[ PV = \frac{4000}{(1 + 0.072)^6} = \frac{4000}{(1.072)^6} \approx \frac{4000}{1.484812} \approx 2691.62 \] Therefore, you should deposit approximately **$2,691.62** today.