$2^{-5}\cdot 2^8={\displaystyle \frac{1}{2^5}}\cdot 2^8=$${\displaystyle \frac{2^8}{2^5}}=2^3=8$

${\mathrm{0,1}}^2=\mathrm{0,1}\cdot \mathrm{0,1}=\mathrm{0,01}$