a) $$\sqrt{0,36\cdot144}=\sqrt{0,36}\cdot\sqrt{144}=0,6\cdot12=7,2$$
б) $$\sqrt{54}\cdot\sqrt{24}=\sqrt{54\cdot24}=\sqrt{1296}=36$$
в) $$\frac{\sqrt{72}}{\sqrt{50}}=\sqrt{\frac{72}{50}}=\sqrt{\frac{36}{25}}=\frac{\sqrt{36}}{\sqrt{25}}=\frac{6}{5}=1,2$$
г) $$\sqrt{3^6\cdot2^4}=\sqrt{(3^3)^2\cdot(2^2)^2}=3^3\cdot2^2=27\cdot4=108$$
Ответ: a) $$7,2$$; б) $$36$$; в) $$1,2$$; г) $$108$$