Ответ:

  1. \(\sqrt{\frac{27}{32}}=\sqrt{\frac{27\cdot2}{64}}=\frac{3\sqrt6}{8}\).
  2. \(\sqrt{\frac{28}{75}}=\frac{2\sqrt{21}}{15}\).
  3. \(\sqrt{\frac{64}{99}}=\frac{8\sqrt{11}}{33}\).
  4. \(\sqrt{\frac{242}{225}}=\frac{11\sqrt2}{15}\).
  5. \(\sqrt{\frac{7.5}{28.9}}=\sqrt{\frac{75}{289}}=\frac{5\sqrt3}{17}\).
  6. \(\sqrt{\frac{0.225}{16.2}}=\sqrt{\frac1{72}}=\frac{\sqrt2}{12}\).

Ответ: 1) \(\frac{3\sqrt6}{8}\); 2) \(\frac{2\sqrt{21}}{15}\); 3) \(\frac{8\sqrt{11}}{33}\); 4) \(\frac{11\sqrt2}{15}\); 5) \(\frac{5\sqrt3}{17}\); 6) \(\frac{\sqrt2}{12}\).