Final answer:
The future value of $100 after five years at a 5% simple interest rate is $125, calculated by multiplying the annual simple interest of $5 by 5 years and adding it to the principal amount.
Step-by-step explanation:
The future value of $100 after five years at a 5% simple interest rate is $125. Here's how to calculate it:
- Firstly, determine the annual interest: $100 × 0.05 = $5 per year.
- Then, multiply the annual interest by the number of years: $5 × 5 years = $25.
- Add this total interest to the original principal to find the future value: $100 + $25 = $125.
Thus, using a simple interest formula where interest is calculated only on the initial amount, or principal, the total future amount will be $125 in five years.