Final answer:
To calculate the value of John's investment after 5 years, use the formula for compound interest. The correct answer is B. $23,639.
Step-by-step explanation:
To calculate the value of John's investment after 5 years, we can use the formula for compound interest. The formula is: final value = initial value * (1 + interest rate)^number of periods.
In this case, John's initial investment is $20,000, the interest rate is 4%, and the number of periods is 5 years.
Therefore, the final value of John's investment would be $20,000 * (1 + 0.04)^5 = $23,638.88.
So the correct answer is B. $23,639.