a) \(\sqrt{0.36}\cdot 25 = 0.6 \cdot 25 = 15\)
б) \(\sqrt{8}\cdot \sqrt{18} = \sqrt{8 \cdot 18} = \sqrt{144} = 12\)
в) \(\sqrt{2^4\cdot 5^2} = \sqrt{16 \cdot 25} = \sqrt{400} = 20\)
г) \(\frac{\sqrt{27}}{\sqrt{3}} = \sqrt{\frac{27}{3}} = \sqrt{9} = 3\)
Ответ: а) 15; б) 12; в) 20; г) 3