Answer: 6 cm
Step-by-step explanation:
6 cm is the radius because half the diameter is the radius
 
        
                    
             
        
        
        
Could you explain this better. Maybe in a picture or better format?
 
        
             
        
        
        
9514 1404 393
Answer:
   see attached
Step-by-step explanation:
The attachment shows the ordered pairs (x, f(x)) and their graph.
 
        
             
        
        
        
Im pretty sure the answer id b