39. Найдите значения выражений:

a) $$\sqrt{36 \cdot 441} = \sqrt{36} \cdot \sqrt{441} = 6 \cdot 21 = 126$$

б) $$\sqrt{729 \cdot 16} = \sqrt{729} \cdot \sqrt{16} = 27 \cdot 4 = 108$$

в) $$\sqrt{0.25 \cdot 0.0196} = \sqrt{0.25} \cdot \sqrt{0.0196} = 0.5 \cdot 0.14 = 0.07$$

г) $$\sqrt{0.0004 \cdot 30.25} = \sqrt{0.0004} \cdot \sqrt{30.25} = 0.02 \cdot 5.5 = 0.11$$

д) $$\sqrt{18 \cdot 72} = \sqrt{18 \cdot 18 \cdot 4} = 18 \cdot 2 = 36$$

е) $$\sqrt{15 \cdot 60} = \sqrt{15 \cdot 15 \cdot 4} = 15 \cdot 2 = 30$$

ж) $$\sqrt{0.44 \cdot 99} = \sqrt{0.44 \cdot 9 \cdot 11} = \sqrt{4 \cdot 0.11 \cdot 9 \cdot 11} = \sqrt{4 \cdot 9 \cdot 1.21} = 2 \cdot 3 \cdot 1.1 = 6.6$$

з) $$\sqrt{0.0012 \cdot \sqrt{75}} = \sqrt{\frac{12}{10000} \cdot \sqrt{25 \cdot 3}} = \sqrt{\frac{12}{10000} \cdot 5\sqrt{3}} = \sqrt{\frac{60\sqrt{3}}{10000}} = \frac{\sqrt{60\sqrt{3}}}{100}$$