Final answer:
To calculate the value of the retirement fund after 40 years, we use the formula for compound interest.
Step-by-step explanation:
To calculate the value of the retirement fund after 40 years, we can use the formula for compound interest:
FV = P(1+r)^n
- FV = future value of the retirement fund
- P = annual investment
- r = annual interest rate
- n = number of years
In this case, the annual investment is $4,000, the annual interest rate is 7%, and the number of years is 40:
FV = 4,000(1+0.07)^40
Calculating this equation gives us the value of the retirement fund after 40 years.