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Question Allison accumulated \( \$ 7,000 \) in credit card debt. If the interest rate is \( 15 \% \) per year and she does not make any paym 3 years, how much will she owe on this debt in 3 years for quarterly compounding? Round your answer to the nearest cent. Do NOT round until you calculate the final answer

Ask by Harper Pena. in the United States
Jan 24,2025

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Answer

Allison will owe approximately \$10,888.18 on her credit card debt in 3 years with quarterly compounding.

Solution

To calculate the amount Allison will owe on her credit card debt in 3 years with quarterly compounding, 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 (initial amount of money). - \( r \) is the annual interest rate (in decimal form). - \( n \) is the number of times that interest is compounded per year. - \( t \) is the time the money is invested for in years. Given: - \( P = \$7,000 \) - \( r = 15\% = 0.15 \) - \( n = 4 \) (quarterly compounding) - \( t = 3 \) years Substitute the given values into the formula: \[ A = 7000 \left( 1 + \frac{0.15}{4} \right)^{4 \times 3} \] Now, we can calculate the amount Allison will owe on her credit card debt in 3 years with quarterly compounding. Calculate the value by following steps: - step0: Calculate: \(7000\left(1+\frac{0.15}{4}\right)^{4\times 3}\) - step1: Divide the terms: \(7000\left(1+\frac{3}{80}\right)^{4\times 3}\) - step2: Add the numbers: \(7000\left(\frac{83}{80}\right)^{4\times 3}\) - step3: Multiply the numbers: \(7000\left(\frac{83}{80}\right)^{12}\) - step4: Simplify: \(7000\times \frac{83^{12}}{80^{12}}\) - step5: Rewrite the expression: \(40\times 175\times \frac{83^{12}}{80^{12}}\) - step6: Rewrite the expression: \(40\times 175\times \frac{83^{12}}{40^{12}\times 2^{12}}\) - step7: Reduce the numbers: \(175\times \frac{83^{12}}{40^{11}\times 2^{12}}\) - step8: Rewrite the expression: \(25\times 7\times \frac{83^{12}}{40^{11}\times 2^{12}}\) - step9: Rewrite the expression: \(25\times 7\times \frac{83^{12}}{5^{11}\times 8^{11}\times 2^{12}}\) - step10: Rewrite the expression: \(5^{2}\times 7\times \frac{83^{12}}{5^{11}\times 8^{11}\times 2^{12}}\) - step11: Reduce the numbers: \(7\times \frac{83^{12}}{5^{9}\times 8^{11}\times 2^{12}}\) - step12: Multiply the fractions: \(\frac{7\times 83^{12}}{5^{9}\times 8^{15}}\) After calculating, Allison will owe approximately $10,888.18 on her credit card debt in 3 years with quarterly compounding.

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To find out how much Allison will owe in 3 years, we use the formula for compound interest: \[ A = P \left(1 + \frac{r}{n}\right)^{nt} \] Where: - \( A \) is the amount owed after time \( t \), - \( P \) is the principal amount (initial debt), - \( r \) is the annual interest rate (as a decimal), - \( n \) is the number of times the interest is compounded per year, and - \( t \) is the number of years. Plugging in the values: - \( P = 7000 \), - \( r = 0.15 \), - \( n = 4 \) (quarterly compounding), - \( t = 3 \). The calculation would be: \[ A = 7000 \left(1 + \frac{0.15}{4}\right)^{4 \times 3} \] \[ A = 7000 \left(1 + 0.0375\right)^{12} \] \[ A = 7000 \left(1.0375\right)^{12} \] Now, calculating \( (1.0375)^{12} \): \[ (1.0375)^{12} \approx 1.491825 \] Thus: \[ A \approx 7000 \times 1.491825 \approx 10443.78 \] Therefore, after 3 years, Allison will owe approximately **$10,443.78** on her credit card debt.

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