The answer is 2:1.
The centroid separates the median, or the point from the midpoint of a side of a triangle with its opposite angle, at a ratio of 2:1, meaning that one segment is 1/3 the length of the median and the other segment is 2/3 the length of the median. 
        
             
        
        
        
The range refers to the value of y for which x is define.
So let y=f(x),

Try making x the subject to obtain,

x is defined for all real values of y greater than 
0.
Hence the correct answer is D.
 
        
                    
             
        
        
        
2: Midpoint of segment AC is given as B3: Given4: Knowing that AC~=BC, AC~= DE
        
             
        
        
        
The common factors of 32 and 48 are 16, 8, 4, 2, 1,