Respuesta :

6^2 = 4^2 + b^2
36 = 16 + b^2
b^2 = 20
[tex]b = 2 \sqrt{5} [/tex]
A^2+B^2=C^2
4^2+b^2=6^2
16+b^2=36
-16        -16 
b^2=20
it would be 4.4 or if you want to round it 4.