Ответ:
- \(\sqrt{9\cdot0.64}=\sqrt{5.76}=2.4\).
- \(2\frac{14}{25}=\frac{64}{25}\), поэтому \(\sqrt{\frac{1}{25}\cdot\frac{64}{25}}=\sqrt{\frac{64}{625}}=\frac{8}{25}\).
- \(\sqrt{14\cdot21\cdot6}=\sqrt{1764}=42\).
- \(\sqrt{3.2}\cdot\sqrt{80}=\sqrt{3.2\cdot80}=\sqrt{256}=16\).
- \(\frac{\sqrt{162}}{\sqrt{2}}=\sqrt{\frac{162}{2}}=\sqrt{81}=9\).
