Verified Answer :

apologiabiology

pemdas, so exponent before multiply
so do a^-1/2 then multiply it by 2

remember that \(x^ \frac{m}{n}= \sqrt[n]{x^m}\) and
\(x^{-m}= \frac{1}{x^m}\)
therefor, \(a^ \frac{-1}{2}= \frac{1}{a^ \frac{1}{2} } = \frac{1}{ \sqrt{a} }\)
the we multiply by 2

\(\frac{2}{ \sqrt{a} }\)

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