Answer: i dont know how exact you want it but the answer is 31.4159265359
Step-by-step explanation: you have to double the raduis and multiple buy pie.
 
        
             
        
        
        
Answer:
total sample space is 91
no of cookies in dog shape is 30
therefore 
p(d)=30/91
 
        
             
        
        
        
For this one I'm going to assume that 4 7a means 4 * 7a...
(8 + 7a) + 4 * 7a =
8 + 7a + 28a =
8 + 35a
If I read it wrong and 4 7a is actually 47a then...
(8 + 7a) + 47a =
8 + 54a = 
2(4 + 27a)
        
             
        
        
        
Answer:
Rays: A, B, C, D - 4 rays for each.
Line segments: AB, BD, DC, CA.