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Sagot :
To determine how much money will be in the account after 10 years, we need to use the compound interest formula:
[tex]\[ A = P \left(1 + \frac{r}{n}\right)^{nt} \][/tex]
where:
- [tex]\( A \)[/tex] is the amount of money in the account after [tex]\( t \)[/tex] years.
- [tex]\( P \)[/tex] is the initial deposit (principal).
- [tex]\( r \)[/tex] is the annual interest rate (decimal).
- [tex]\( n \)[/tex] is the number of times the interest is compounded per year.
- [tex]\( t \)[/tex] is the number of years the money is invested or borrowed for.
Let's apply the given values to the formula:
1. Initial deposit ([tex]\( P \)[/tex]): [tex]$4000 2. Annual interest rate (\( r \)): 6%, which is 0.06 as a decimal. 3. Times compounded per year (\( n \)): monthly, so \( n = 12 \). 4. Number of years (\( t \)): 10 Substitute these values into the compound interest formula: \[ A = 4000 \left(1 + \frac{0.06}{12}\right)^{12 \times 10} \] First, calculate the rate per period: \[ \frac{0.06}{12} = 0.005 \] Then, add 1 to it: \[ 1 + 0.005 = 1.005 \] Now raise this value to the power of the total number of compounding periods (\( 12 \times 10 \)): \[ (1.005)^{120} \] Using a calculator, we find: \[ (1.005)^{120} \approx 1.819396792 \] Finally, multiply this result by the initial deposit (\( 4000 \)): \[ 4000 \times 1.819396792 \approx 7277.59 \] So, the amount in the account after 10 years will be approximately $[/tex]7277.59.
[tex]\[ A = P \left(1 + \frac{r}{n}\right)^{nt} \][/tex]
where:
- [tex]\( A \)[/tex] is the amount of money in the account after [tex]\( t \)[/tex] years.
- [tex]\( P \)[/tex] is the initial deposit (principal).
- [tex]\( r \)[/tex] is the annual interest rate (decimal).
- [tex]\( n \)[/tex] is the number of times the interest is compounded per year.
- [tex]\( t \)[/tex] is the number of years the money is invested or borrowed for.
Let's apply the given values to the formula:
1. Initial deposit ([tex]\( P \)[/tex]): [tex]$4000 2. Annual interest rate (\( r \)): 6%, which is 0.06 as a decimal. 3. Times compounded per year (\( n \)): monthly, so \( n = 12 \). 4. Number of years (\( t \)): 10 Substitute these values into the compound interest formula: \[ A = 4000 \left(1 + \frac{0.06}{12}\right)^{12 \times 10} \] First, calculate the rate per period: \[ \frac{0.06}{12} = 0.005 \] Then, add 1 to it: \[ 1 + 0.005 = 1.005 \] Now raise this value to the power of the total number of compounding periods (\( 12 \times 10 \)): \[ (1.005)^{120} \] Using a calculator, we find: \[ (1.005)^{120} \approx 1.819396792 \] Finally, multiply this result by the initial deposit (\( 4000 \)): \[ 4000 \times 1.819396792 \approx 7277.59 \] So, the amount in the account after 10 years will be approximately $[/tex]7277.59.
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