Posted by **Yoyo** on Wednesday, November 13, 2013 at 1:59pm.

Square root 'a'

16^-2 = 2?

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**Ms. Sue**, Wednesday, November 13, 2013 at 2:01pm
http://www.google.com/search?q=16%5E-2&rlz=1C1AVSX_enUS414US423&oq=16%5E-2&aqs=chrome..69i57j0.1338j0j8&sourceid=chrome&espv=210&es_sm=122&ie=UTF-8

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**Yoyo**, Wednesday, November 13, 2013 at 2:06pm
I need it 2 to the power of ? =16^-2

- Maths -
**Steve**, Wednesday, November 13, 2013 at 3:15pm
16 = 2^4

so,

16^-2 = (2^4)^-2 = 2^-8

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