\|\mathbf{r} \times \mathbf{s}\| = \sqrt{9^2 + (-2)^2 + 5^2} = \sqrt{81 + 4 + 25} = \sqrt{110}

\|\mathbf{r} \times \mathbf{s}\| = \sqrt{9^2 + (-2)^2 + 5^2} = \sqrt{81 + 4 + 25} = \sqrt{110}

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