2 significant digits should be represented in the product
        
             
        
        
        
Answer:
Step-by-step explanation:
Note that 128 = 64*2.  The square root of 128 is thus 8sqrt(2).  Answer B is the only one that could be correct.
 
        
             
        
        
        
Answer:
9
Step-by-step explanation:
Replace a by 7
and 
b by 4
and 
c by 1/2
7+4(1/2)
7+2=9
 
        
             
        
        
        
Answer:
5 and 7
Step-by-step explanation:
5 and 7 are the nearest integers, and 6 is right in between them
 
        
                    
             
        
        
        
Well i would say it would be 8.9