- $$3 \cdot \sqrt{11} \cdot \sqrt{44} = 3 \cdot \sqrt{11} \cdot \sqrt{4 \cdot 11} = 3 \cdot \sqrt{11} \cdot 2 \cdot \sqrt{11} = 3 \cdot 2 \cdot 11 = 66$$
- $$\sqrt{3^4} \cdot \sqrt{7^2} = 3^2 \cdot 7 = 9 \cdot 7 = 63$$
- $$\sqrt{13^2} \cdot 2^4 = 13 \cdot 16 = 208$$
- $$0.2 \cdot \sqrt[4]{\frac{4}{25}} = 0.2 \cdot \sqrt[4]{\frac{2^2}{5^2}} = 0.2 \cdot \sqrt{\frac{2}{5}} = \frac{1}{5} \cdot \sqrt{\frac{2}{5}} = \frac{\sqrt{\frac{2}{5}}}{5}$$
Ответы: 1) 66; 2) 63; 3) 208; 4) $$\frac{\sqrt{\frac{2}{5}}}{5}$$