What’s the missing length to the nearest tenth

Answer:
8.9
Step-by-step explanation:
Use the Pythagorean Theorem (a^2 + b^2 = c^2)
a = 4
b = 8
c^2 = 4^2 + 8^2
c^2 = 16 + 64
c^2 = 80
c = sqrt(80)
c = 8.9443
to the nearest tenth = 8.9
Hope this helps!