N=11 
I’m not 100% sure 
Hoped this helped
        
                    
             
        
        
        
Answer:
(A) 509.78
We need to move the decimal point after the first non-zero digit
So,
=> 5.0978 × 10² (Since the decimal point is moved two places to the left)
(B) 0.0289
Again after the first non-zero digit:
So, it becomes:
=> 2.89 × 10⁻² (Since the decimal point is moved 2 places to the right so it will be negative also)
 
        
                    
             
        
        
        
Answer:
it's 2
Step-by-step explanation:
square root of 8 is 2
 
        
                    
             
        
        
        
Answer:
fghjk
Step-by-step explanation:
 
        
             
        
        
        
These could be some possible amswers:2/8, 8,32, 3/12