.72 
.725 would be less because it has more behind the decimal. 
.72 would be more because there are only 2 numbers behind the decimal
        
             
        
        
        
I only see one question. 
The answer is the root 4 has the multiplicity of 2.
        
             
        
        
        
Your answer will be -3 only
        
             
        
        
        
Answer:
(Area of circle a)/5
Step-by-step explanation:
(Area of circle b) = (1/5)* (Area of circle a)
What is the area of circle a?  There is not enough given information
 
        
                    
             
        
        
        
Answer:
6
Step-by-step explanation: