Final answer:
Marsha earned $850 in interest over 2 years.
Step-by-step explanation:
To calculate the amount of interest earned, we can use the simple interest formula:
Interest = Principal × Rate × Time
In this case, Marsha deposited $8500 (the principal), the interest rate is 5%, and the time is 2 years.
Interest = $8500 × 0.05 × 2 = $850
Therefore, Marsha earned $850 in interest over 2 years.