Answer:81.31
Step-by-step explanation:
 
        
             
        
        
        
A is the correct answer. When put into calculator, the decimals ends.
        
             
        
        
        
I'm sorry, I don't see the question. Could you please retake the photo in better quality so I could answer it? Thanks!
        
             
        
        
        
Coercivity is the method a magnet loses its power