Answer:
= 25
Step-by-step explanation:
25
[tex]a^{-m} = \frac{1}{a^{m}}\\\\\\frac{1}{a^{-m}}=a^{m}\\\\(\frac{2^{-1}}{10^{-1}})^{2}=(2^{-1}*\frac{1}{10^{-1}})^{2}\\\\=(\frac{1}{2}*10)^{2}\\\\=(5)^{2}\\\\=25[/tex]
