To calculate the annual deposit Randy Hill needs to make, we can use the formula for the future value of an ordinary annuity:
\[ FV = P \times \left(\frac{(1 + r)^n - 1}{r}\right) \]
Where:
FV = Future value (desired retirement amount)
P = Annual deposit
r = Interest rate per period
n = Number of periods (years in this case)
Plugging in the given values:
FV = $1,500,000
r = 0.10 (10% per year)
n = 20
\[ $1,500,000 = P \times \left(\frac{(1 + 0.10)^{20} - 1}{0.10}\right) \]
Simplifying the equation:
\[ P = \frac{$1,500,000}{\left(\frac{(1 + 0.10)^{20} - 1}{0.10}\right)} \]
Evaluating the expression:
\[ P \approx $26,189 \]
Therefore, Randy Hill needs to deposit approximately $26,189 each year to reach his goal of $1,500,000 in 20 years. Therefore, the correct answer is c) $26,189.