Answer:
6.4
Step-by-step
You have to use the Pythagorean Theorem. a^2+b^2=c^2
4^2+5^2=c^2
16+25=41
The square root of 41 is 6.40312...
Round that to the nearest tenth to get 6.4
Answer: 6.4
Step-by-step explanation: a^2 +b^2=c^2
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