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Suson has R1 000 that she invests in an occount that pays \( 7.5 \% \) interest compounded yearly. How much money does Susan have at the end of 5 ye

Ask by Floyd Hanson. in South Africa
Feb 03,2025

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Answer

Susan will have approximately R1,435.63 at the end of 5 years.

Solution

To find out how much money Susan has at the end of 5 years with an investment of R1,000 and an annual interest rate of 7.5% compounded yearly, we can use the formula for compound interest: \[ A = P \left( 1 + \frac{r}{100} \right)^n \] Where: - \( A \) is the amount of money at the end of the investment period - \( P \) is the principal amount (initial investment) - \( r \) is the annual interest rate - \( n \) is the number of years Given: - \( P = R1,000 \) - \( r = 7.5\% \) - \( n = 5 \) years Substitute the values into the formula: \[ A = 1000 \left( 1 + \frac{7.5}{100} \right)^5 \] Now, we can calculate the amount of money Susan has at the end of 5 years. Calculate the value by following steps: - step0: Calculate: \(1000\left(1+\frac{7.5}{100}\right)^{5}\) - step1: Divide the terms: \(1000\left(1+\frac{3}{40}\right)^{5}\) - step2: Add the numbers: \(1000\left(\frac{43}{40}\right)^{5}\) - step3: Simplify: \(1000\times \frac{43^{5}}{40^{5}}\) - step4: Rewrite the expression: \(40\times 25\times \frac{43^{5}}{40^{5}}\) - step5: Reduce the numbers: \(25\times \frac{43^{5}}{40^{4}}\) - step6: Rewrite the expression: \(25\times \frac{43^{5}}{5^{4}\times 8^{4}}\) - step7: Rewrite the expression: \(5^{2}\times \frac{43^{5}}{5^{4}\times 8^{4}}\) - step8: Reduce the numbers: \(1\times \frac{43^{5}}{5^{2}\times 8^{4}}\) - step9: Multiply: \(\frac{43^{5}}{320^{2}}\) Susan will have approximately R1,435.63 at the end of 5 years.

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To calculate how much money Suson will have at the end of 5 years with her compounded interest investment, you can use the formula for compound interest: \[ A = P(1 + r)^n \] Here, \( A \) is the amount of money accumulated after n years, including interest. \( P \) is the principal amount (the initial investment), \( r \) is the annual interest rate (decimal), and \( n \) is the number of years the money is invested. For Suson's investment: - \( P = R1,000 \) - \( r = 0.075 \) (which is \( 7.5\% \)) - \( n = 5 \) Plugging in these values: \[ A = 1000(1 + 0.075)^5 \] \[ A = 1000(1.075)^5 \] \[ A \approx 1000 \times 1.441 \] \[ A \approx R1,441 \] So, at the end of 5 years, Suson will have approximately R1,441. If you’re looking to invest, it’s always good to explore options for reinvesting your interest to maximize your compounding effect. For Suson, keeping her money in an account with a competitive interest rate will make a significant difference over time—a great way to grow her savings without lifting a finger! Many people make the common mistake of withdrawing interest earnings too soon or failing to reinvest them. Even small amounts can add up dramatically over the years if left to compound, so think long-term and let that money work for you!

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