Hello there!
2^-2
Apply the Negative Exponent Law (it states that if you have a number with a negative exponent, you flop it over)
What does it mean?
If we have 2^-2, the law states that we have to flop it over:
[tex]\frac{1}{2^{2} }[/tex]
2^2 (2 times 2) is 4, so
[tex]\frac{1}{4}[/tex]
Hope this helps you!
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