Answer:
12.81
Step-by-step explanation:
Use the pythagorean theorem
a^2 + b^2 = c^2
8^2 + 10^2 = c^2
64 + 100 = 164
c^2 = 164
[tex]\sqrt{164}[/tex]
c = 12.80624...
round up to 12.81
