To calculate the difference between Alexx and Spenser's investments after 30 years, apply the future value formula with their respective interest rates and subtract Spenser's future value from Alexx's. Alexx's investment is compounded annually at 5%, and Spenser's at 4.75%, to account for the retirement fund's administrative fee.
To calculate how much more Alexx will have than Spenser after 30 years, we must apply the formula for future value with the different interest rates they will each receive. For Alexx, the future value will be calculated using a 5% interest rate while Spenser's future value will use a 4.75% rate, reflecting the 0.25% administrative fee taken by the retirement fund.
The formula to use for the future value of an investment is:
FV = PV (1 + r)^n
Where:
FV represents the future value of the investment.
PV is the present value or initial amount invested, which is $5,000.
r is the annual interest rate (0.05 for Alexx and 0.0475 for Spenser).
n is the number of years the money is invested, which is 30.
Calculating for both investors:
Alexx's Investment after 30 years: $5,000(1 + 0.05)^{30}
Spenser's Investment after 30 years: $5,000(1 + 0.0475)^{30}
Subtracting Spenser's future value from Alexx's will give us how much more Alexx has:
Alexx's FV - Spenser's FV
Follow these steps, and you will be able to determine the difference in the future value of their investments due to the varying interest rates.