Indices, SM-Bank 066 MC Given that \(21^2=441\), then \(\sqrt{441}=\) ? \(21\) \(42\) \(420\) \(194\ 481\) Show Answers Only \(A\) Show Worked Solution \(441=21\times 21\ \ \text{(Given)}\) \(\therefore \sqrt{441}\) \(=\sqrt{ 21\times 21}\) \(=21\) \(\Rightarrow A\)