Answer:
The correct option is C: I = 10⁸I₀.
Step-by-step explanation:
The function of the Richter scale is:

Since the magnitude of the earthquake is 8.0, the relation between the intensity, I, with the intensity of the threshold quake, Io, is:



Therefore, the correct option is C: I = 10⁸I₀.
I hope it helps you!
Answer:
72
Step-by-step explanation:
because you do 8x9 and its 72
Option 1 because since it’s less than not less than or equal to, it stays opened. also you follow the direction that the less than sign is pointing towards.