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After 8 years, Yolanda will have approximately \$5,332.73 in her account.
Solución
To calculate the amount in the account after 8 years with monthly compounding interest, 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 amount of money).
- \( r \) is the annual interest rate (decimal).
- \( n \) is the number of times that interest is compounded per year.
- \( t \) is the number of years the money is invested or borrowed.
Given:
- \( P = 4000 \)
- \( r = 3.6\% = 0.036 \)
- \( n = 12 \) (since the interest is compounded monthly)
- \( t = 8 \)
Now, we can substitute these values into the formula:
\[
A = 4000 \left(1 + \frac{0.036}{12}\right)^{12 \times 8}
\]
Let's calculate the expression step by step.
1. Calculate \( \frac{r}{n} \):
\[
\frac{0.036}{12}
\]
2. Calculate \( nt \):
\[
12 \times 8
\]
3. Substitute these values back into the formula and calculate \( A \).
Let's perform these calculations.
Calculate the value by following steps:
- step0: Calculate:
\(12\times 8\)
- step1: Multiply the numbers:
\(96\)
Calculate or simplify the expression \( 0.036/12 \).
Calculate the value by following steps:
- step0: Calculate:
\(\frac{0.036}{12}\)
- step1: Convert the expressions:
\(\frac{\frac{9}{250}}{12}\)
- step2: Multiply by the reciprocal:
\(\frac{9}{250}\times \frac{1}{12}\)
- step3: Reduce the numbers:
\(\frac{3}{250}\times \frac{1}{4}\)
- step4: Multiply the fractions:
\(\frac{3}{250\times 4}\)
- step5: Multiply:
\(\frac{3}{1000}\)
Calculate or simplify the expression \( 4000*(1+0.003)^96 \).
Calculate the value by following steps:
- step0: Calculate:
\(4000\left(1+0.003\right)^{96}\)
- step1: Add the numbers:
\(4000\times 1.003^{96}\)
- step2: Convert the expressions:
\(4000\left(\frac{1003}{1000}\right)^{96}\)
- step3: Simplify:
\(4000\times \frac{1003^{96}}{1000^{96}}\)
- step4: Rewrite the expression:
\(1000\times 4\times \frac{1003^{96}}{1000^{96}}\)
- step5: Reduce the numbers:
\(4\times \frac{1003^{96}}{1000^{95}}\)
- step6: Rewrite the expression:
\(4\times \frac{1003^{96}}{8^{95}\times 125^{95}}\)
- step7: Rewrite the expression:
\(2^{2}\times \frac{1003^{96}}{2^{285}\times 125^{95}}\)
- step8: Reduce the numbers:
\(1\times \frac{1003^{96}}{2^{283}\times 125^{95}}\)
- step9: Multiply the fractions:
\(\frac{1003^{96}}{2^{283}\times 125^{95}}\)
Now that we have the necessary calculations:
1. The monthly interest rate \( \frac{r}{n} = 0.003 \).
2. The total number of compounding periods \( nt = 96 \).
We can substitute these values into the compound interest formula:
\[
A = 4000 \left(1 + 0.003\right)^{96}
\]
Calculating this gives us:
\[
A \approx 4000 \times (1.003)^{96} \approx 5332.73
\]
Finally, rounding to the nearest cent, Yolanda will have approximately:
\[
\boxed{5332.73}
\]
in her account after 8 years.
Respondido por UpStudy AI y revisado por un tutor profesional
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