Find the total amount of the investment after 10 years if $6,000 is invested at 7.43% compounded daily.

1 answer

To find the total amount of an investment after a certain period with daily compounding interest, we can use the formula:

\[ A = P \left(1 + \frac{r}{n}\right)^{nt} \]

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 time the money is invested for in years.

Given:

  • \( P = 6000 \) (the initial investment)
  • \( r = 0.0743 \) (7.43% as a decimal)
  • \( n = 365 \) (interest is compounded daily)
  • \( t = 10 \) (the investment is for 10 years)

Now, plug these values into the formula:

\[ A = 6000 \left(1 + \frac{0.0743}{365}\right)^{365 \times 10} \]

Calculating \( \frac{0.0743}{365} \):

\[ \frac{0.0743}{365} \approx 0.0002030151 \]

Now, we plug this back into the equation:

\[ A = 6000 \left(1 + 0.0002030151\right)^{3650} \]

Calculating \( 1 + 0.0002030151 \):

\[ 1 + 0.0002030151 \approx 1.0002030151 \]

Now raising this to the power of \( 3650 \):

\[ A = 6000 \left(1.0002030151\right)^{3650} \]

Using a calculator or software to compute \( (1.0002030151)^{3650} \):

\[ (1.0002030151)^{3650} \approx 2.095378644 \]

Now, we can calculate \( A \):

\[ A \approx 6000 \times 2.095378644 \]

\[ A \approx 12572.27 \]

Therefore, the total amount of the investment after 10 years is approximately:

\[ \boxed{12572.27} \]