Final answer:
The future value of investments for Alexx and Spenser are calculated using the compound interest formula, accounting for their respective APRs. The difference in their investments after 30 years is found by subtracting Spenser's final amount from Alexx's.
Step-by-step explanation:
The question involves calculating the future value of investments for both Alexx and Spenser, considering the different annual percentage rates (APRs) they each receive. Alexx is earning an APR of 5% by investing directly, while Spenser, through a retirement fund, is earning an APR of 4.75% because of the 0.25% administrative fee on managed assets.
To find out how much more Alexx will have than Spenser after 30 years, we need to use the formula for compound interest: FV = P(1 + r/n)^(nt), where FV is the future value, P is the principal amount ($5,000), r is the annual interest rate (expressed as a decimal), n is the number of times that interest is compounded per year, and t is the number of years.
Assuming the interest is compounded annually (n = 1), Alexx's investment would grow as follows:
FV = $5,000(1 + 0.05/1)^(1*30) = $5,000(1.05)^30.
Spenser's investment would grow similarly, but at a 4.75% interest rate:
FV = $5,000(1 + 0.0475/1)^(1*30) = $5,000(1.0475)^30.
After calculating these values, we subtract Spenser's final amount from Alexx's to find the difference in their investments after 30 years.