Answer:
60$
Explanation:
The formula for simple interest is:
I = P x r x t
where I is the interest earned, P is the principal amount (initial investment), r is the annual interest rate, and t is the time in years.
In this case, P = $500, r = 3% = 0.03 (since the annual interest rate is expressed as a decimal), and t = 4 years. Plugging these values into the formula, we get:
I = $500 x 0.03 x 4
I = $60
Therefore, the interest earned after 4 years is $60.