The answer is C.7/3 pi ft lmk if you want more answers
        
             
        
        
        
Answer:
Step-by-step explanation:

 
        
             
        
        
        
The appropriate formula is C = 2*pi*r.  
Here, C = 2*pi*(50 units) = 100*pi units (answer)
        
             
        
        
        
Here how i found my answer.
 
        
        
        
Answer:
D) 50/3
Step-by-step explanation:
6/10 = 10/(6+x-6)
6/10 = 10/x
6x = 100
  x = 100/6
  x = 50/3