Ответ:

  1. \(\sqrt[3]{125}=5\).
  2. \(\sqrt{0.0001}=0.01\).
  3. \(\sqrt[3]{-32}=-2\sqrt[3]{4}\).
  4. \(\sqrt[3]{3\frac{3}{8}}=\sqrt[3]{\frac{27}{8}}=\frac32\).
  5. \(\sqrt[4]{81}\cdot\sqrt[6]{4}=3\sqrt[6]{4}\).
  6. \(\sqrt[3]{9\cdot21}=\sqrt[3]{189}=3\sqrt[3]{7}\).
  7. \(\frac{\sqrt[3]{625}}{\sqrt[3]{5}}=\sqrt[3]{125}=5\).
  8. \(\sqrt[5]{\sqrt[6]{6^{10}\cdot(1/6)^{15}}}=\sqrt[5]{\sqrt[6]{6^{-5}}}=6^{-1/6}=\frac1{\sqrt[6]{6}}\).