75.68
1) When we calculate the square root of 5728, we have
[tex]\begin{gathered} \sqrt{5728}=75.68355171 \\ \sqrt{5728}=\sqrt{358\cdot4^2}=4\sqrt{358}=75.68355171 \end{gathered}[/tex]Factorizing 5728 we have 5728= 358*4²,
Considering that to Limit the digit of 75.68355171 is to approximate it then
it is 75.68
