C.
The equation should be...
a^2 + b^2 = c^2
x^2 + (x+3)^2 =10.81665383^2
When you plug it in...
6^2 + (6+3)^2 = 117
6^2 + (9)^2 = 117
36 + 81= 117
Answer:
C. 6
Step-by-step explanation:
