Answer:
To calculate the amount of interest Marissa will earn in 8 years on her savings account, we can use the formula for simple interest:
I = P * r * t
where:
I = interest earned
P = principal (initial amount in the account)
r = interest rate per year (as a decimal)
t = time period (in years)
Plugging in the given values, we get:
I = $350 * 0.039 * 8
I = $109.20
Therefore, Marissa will earn $109.20 in interest over 8 years.