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Jonah has \( \$ 7,586 \) in an account that earns \( 10 \% \) interest compounded annually. To the nearest cent, how much interest will he carn in 3 years? Use the formula \( B=p(1+r)^{\text {t }} \), where \( B \) is the baiance (final amount), \( p \) is the principal (starting amount), \( r \) is the interest rate expressed as a decimal, and \( t \) is the time in years. \( \$ \).

Ask by Wright Harper. in the United States
Mar 10,2025

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Answer

Jonah will earn approximately \$2,510.97 in interest over 3 years.

Solution

To find the interest Jonah will earn in 3 years, we can use the formula for compound interest: \[ B = p(1 + r)^t \] where: - \( B \) is the balance (final amount) - \( p \) is the principal (starting amount) - \( r \) is the interest rate expressed as a decimal - \( t \) is the time in years Given: - Principal (\( p \)) = $7,586 - Interest rate (\( r \)) = 10% = 0.10 - Time (\( t \)) = 3 years Substitute the given values into the formula: \[ B = 7586(1 + 0.10)^3 \] Now, we can calculate the balance after 3 years using the formula. Calculate the value by following steps: - step0: Calculate: \(7586\left(1+0.1\right)^{3}\) - step1: Add the numbers: \(7586\times 1.1^{3}\) - step2: Convert the expressions: \(7586\left(\frac{11}{10}\right)^{3}\) - step3: Evaluate the power: \(7586\times \frac{1331}{1000}\) - step4: Multiply: \(\frac{5048483}{500}\) The balance after 3 years is $10,096.966. To find the interest earned, we subtract the principal from the balance: Interest = Balance - Principal Interest = $10,096.966 - $7,586 Interest = $2,510.966 Therefore, Jonah will earn approximately $2,510.97 in interest over 3 years.

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The Deep Dive

To calculate the interest earned in 3 years, we will first apply the formula \( B = p(1 + r)^t \). Here, \( p = 7586 \), \( r = 0.10 \), and \( t = 3 \). Plugging in the values, we get: \[ B = 7586(1 + 0.10)^3 = 7586(1.10)^3 \approx 7586 \times 1.331 = 10,091.46 \] Now, to find the interest earned, subtract the principal from the balance: \[ \text{Interest} = B - p = 10,091.46 - 7586 \approx 2505.46 \] So, to the nearest cent, Jonah will earn approximately \( \$ 2505.46 \) in interest in 3 years. --- Did you know that compound interest can significantly increase your savings over time? It's like planting a money tree where the interest earns more interest! Just remember, the earlier you start saving, the more time your money has to grow! If you're curious about more ways to grow your wealth, take a look at books like "The Richest Man in Babylon" or "The Total Money Makeover." These reads can provide insight into personal finance strategies while being an enjoyable journey into money management!

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