Hi there!
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I believe your answer is:
[tex]s = \pm 100[/tex]
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Here’s why:
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I am assuming that the equation given is:
[tex]s^2 = 10,000[/tex]
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[tex]s^2 = 10,000\\\rule{150}{0.5}\\\rightarrow \sqrt{s^2}= \sqrt{10,000}\\\\\rightarrow s = \boxed{\pm 100}\\\rule{150}{0.5}[/tex]
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Hope this helps you. I apologize if it’s incorrect.