The answer would be 3
Hope I helped!
Step-by-step explanation:
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94.33962264% if you cross multiply and divide. Multiply 11.50 and 100 and divide by 12.19 to get this answer.

The Pythagorean theorum states that when
and
are sides and
is the hypotenuse, 
So, let's plug in the values. 
Simplify. The square of a square root is the number inside the square root. 
Subtract 9 from both sides. 
Get the square root of both sides. 
