Answer: A 6.4
Explanation:
Use pythagorean to find sides
c=hypotenuse = x
a= shortleg = 4
b=longleg =5
c²=a²+b² > substitute
x²=4²+5² >simplify
x²=16+25
x²=41 >take square root of both sides
x=√41 >plug in calculator
x=6.4 => A
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