Question

@ robtobey, I posted a photo

Answer 1

@hollywood, i think i solved this for you in your post

Answer 2

\[11\tfrac{1}{9}=\frac{100}{9}\]
\[(\frac{100}{9})^{-\frac{1}{2}}=(\frac{9}{100})^{\frac{1}{2}}=\sqrt{\frac{100}{9}}=\frac{10}{3}\]