Answer:
8.06
Explanation:
C2= a2+ b2
C2= 7 squared + 4 squared
C2= 49+16
C2=65
C is the square root of c2
square root 65
C= 8.06
c= 8
C: 8.06
c=a^2+b^2=42+72≈8.06226
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