8 + 8 = 16
16 - 1 = 15
or
7 + 7 = 14
14+1 = 15
        
                    
             
        
        
        
A Non-example is like there we not enough to grapha
        
                    
             
        
        
        
This is just another way of asking "what is the volume of a sphere of 6cm"
The volume of a sphere is 

The R is 3cm in this problem since the diameter is twice the radius. For a 3cm radius sphere this is 113.1cm^3