Final answer:
Maria will need a nest egg of $250,000 to earn $15,000 a year with a 6% after-tax return on her investments.
Step-by-step explanation:
Maria will need a nest egg that can provide her with $15,000 a year. Assuming a 6% after-tax return on her investments, we can calculate the size of the nest egg using the formula:
Nest Egg = Income Needed / (Rate of Return / 100)
Substituting the values, Nest Egg = $15,000 / (6/100) = $250,000