Answer:
8
Step-by-step explanation:
B^2 = C^2 -A^2 89-25 = 64 sqrt(64) is 8
use Pythagoras rule
[tex]{a}^{2} + {b}^{2} = {c}^{2} [/tex]
[tex]{5}^{2} + {x}^{2} = { \sqrt{89} }^{2} [/tex]
so x = 8
