Pregunta
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A CD, or "certificate of deposit," is a type of savings account with a fixed rate and term, meaning you can only redeem it when the term is over. If you bpen a CD with an initial deposit of \( \$ 1500 \) and an APR of \( 0.15 \% \) compounded monthly, what profit will you have earned when you redeem the CD in 5 years? Round your answer to the nearest cent, if necessary.

Ask by Salazar Beck. in the United States
Jan 24,2025

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After 5 years, you will have earned approximately \$11.29 in profit.

Solución

To determine the profit earned from a Certificate of Deposit (CD) with the given parameters, we'll use the **compound interest formula**: \[ A = P \left(1 + \frac{r}{n}\right)^{nt} \] Where: - \( A \) = the amount of money accumulated after \( t \) years, including interest. - \( P \) = the principal amount (\$1,500). - \( r \) = annual interest rate (in decimal form). - \( n \) = number of times interest is compounded per year. - \( t \) = time the money is invested for in years. **Given:** - \( P = \$1,500 \) - APR (\( r \)) = 0.15% or 0.0015 in decimal. - Compounded monthly (\( n = 12 \)). - Time (\( t = 5 \) years). **Plugging in the values:** \[ A = 1500 \left(1 + \frac{0.0015}{12}\right)^{12 \times 5} \] \[ A = 1500 \left(1 + 0.000125\right)^{60} \] \[ A \approx 1500 \times 1.007527 \] \[ A \approx \$1,511.29 \] **Profit Earned:** \[ \text{Profit} = A - P = 1511.29 - 1500 = \$11.29 \] **Therefore, the profit earned after 5 years is approximately \$11.29.**

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Bonus Knowledge

To calculate the profit earned on a certificate of deposit (CD), we can use the formula for compound interest: \[ A = P \left(1 + \frac{r}{n}\right)^{nt} \] Where: - \( A \) is the amount of money accumulated after n years, including interest, - \( P \) is the principal amount (the initial deposit), - \( r \) is the annual interest rate (decimal), - \( n \) is the number of times that interest is compounded per year, - \( t \) is the time the money is invested for in years. In this case: - \( P = 1500 \) - \( r = 0.0015 \) (which is \( 0.15\% \) as a decimal) - \( n = 12 \) (as interest is compounded monthly), - \( t = 5 \). Now we can plug in the numbers: \[ A = 1500 \left(1 + \frac{0.0015}{12}\right)^{12 \cdot 5} \] Calculating the components: \[ = 1500 \left(1 + 0.000125\right)^{60} \] \[ = 1500 (1.000125)^{60} \] Calculating \( (1.000125)^{60} \): \[ \approx 1.007635 \] Now substitute this back into the equation: \[ A \approx 1500 \times 1.007635 \approx 1511.45 \] Now to find the profit, subtract the principal from the amount: \[ \text{Profit} \approx 1511.45 - 1500 \approx 11.45 \] So, when you redeem the CD in 5 years, you will have earned approximately **\$11.45** in profit.

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