To determine who correctly used the Power Rule of Exponents to simplify \((15^3)^9\), we can apply the rule that states \((a^m)^n = a^{m \cdot n}\).
In this case:
- Base \(a\) is \(15\),
- \(m\) is \(3\),
- \(n\) is \(9\).
So, we calculate: \[ (15^3)^9 = 15^{3 \cdot 9} = 15^{27}. \]
Now let's analyze the responses:
- Amy got \(15^{27}\), which is correct.
- Miguel got \(15^{12}\), which is incorrect since \(3 \cdot 9\) does not equal \(12\).
- Lin got \(15^3\), which is also incorrect since it does not represent the simplification of the original expression.
Thus, the only correct response is Amy.
Correct answer: Amy