Answer :

[tex]\sqrt{13}\approx3.605551....\approx3.6\\\\Answer:B[/tex]



[tex]A.\ 3.5^2=12.25\\\\B.\ 3.6^2=12.96\\\\C.\ 3.7^2=13.96\\\\D.\ 3.8^2=14.44\\\\nearest\ 13\ is\ 12.96=3.6^2[/tex]

[tex]Answer:3.6\ (B)[/tex]