Answer 1

\[\sqrt{\frac{99}{144}} = \frac{\sqrt{3 \times 3 \times 11}}{\sqrt{144}}\] 

          = \[\frac{3\sqrt{11}}{12}\] 

= \[\frac{3 \times 3 . 3166}{12}\]  (using the square root table to find \[\sqrt{11}\]) 

 =0.829