for mhen he son woe 7 years old. Adviser mode a depoit of 25 suo in the bank. The investmont gron at a simple interest rate and when Advisur's son was 28 years old, the value of the invest- ment was RII 972 , o0. At what rate the money nas invested

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The interest rate is approximately $$ r = 1.803809523 $$ or $$ r = \frac{947}{525} $$. Let's denote the principal amount (initial deposit) as $$ P = 25 $$ soles, the time period as $$ t = 28 - 7 = 21 $$ years, and the final amount as $$ A = 972 $$ soles. The formula for calculating the final amount with simple interest is given by: $$ A = P + P \times r \times t $$ where: - $$ A $$ is the final amount, - $$ P $$ is the principal amount, - $$ r $$ is the interest rate, - $$ t $$ is the time period in years. We are given that $$ A = 972 $$, $$ P = 25 $$, and $$ t = 21 $$. We need to find the interest rate $$ r $$. Substitute the given values into the formula: $$ 972 = 25 + 25 \times r \times 21 $$ Now, we can solve for the interest rate $$ r $$ using the equation above. Solve the equation by following steps: - step0: Solve for $$r$$: $$972=25+25r\times 21$$ - step1: Multiply the terms: $$972=25+525r$$ - step2: Swap the sides: $$25+525r=972$$ - step3: Move the constant to the right side: $$525r=972-25$$ - step4: Subtract the numbers: $$525r=947$$ - step5: Divide both sides: $$\frac{525r}{525}=\frac{947}{525}$$ - step6: Divide the numbers: $$r=\frac{947}{525}$$ The interest rate at which the money was invested is approximately $$ r = 1.803809523 $$ or $$ r = \frac{947}{525} $$.

for mhen he son woe 7 years old. Adviser mode a depoit of 25 suo in the bank. The investmont gron at a simple interest rate and when Advisur's son was 28 years old, the value of the invest- ment was RII 972 , o0. At what rate the money nas invested

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for mhen he son woe 7 years old. Adviser mode a depoit of 25 suo in the bank. The investmont gron at a simple interest rate and when Advisur's son was 28 years old, the value of the invest- ment was RII 972 , o0. At what rate the money nas invested

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