Ответ:

  1. \(\sqrt{0.0081\cdot625}=\sqrt{5.0625}=2.25\).
  2. \(\sqrt[4]{\frac{3^8\cdot7^4}{5^4\cdot21^2}}=\sqrt[4]{\frac{3^6\cdot7^2}{5^4}}=\frac{3\sqrt{21}}5\).
  3. \(\frac{\sqrt[5]{96}}{\sqrt[5]{729}}=\sqrt[5]{\frac{2^5\cdot3}{3^6}}=\frac23\).
  4. \(\sqrt[3]{0.108}\cdot\sqrt[3]{2}=\sqrt[3]{0.216}=0.6\).
  5. \(\sqrt[8]{3^5\cdot5^2}\cdot\sqrt[8]{3^3\cdot5^5}=\sqrt[8]{3^8\cdot5^7}=15\sqrt[8]{\frac15}\).

Ответ: 1) 2,25; 2) \(\frac{3\sqrt{21}}5\); 3) \(\frac23\); 4) 0,6; 5) \(15\sqrt[8]{\frac15}\).