Answer:
Design A average is 18.666 and Design B average is 32.
Explanation:
Add each of the trial numbers for each design.  Divide those numbers by 3 for each design to get 18.666 for Design A and 32 for Design B.
 
        
             
        
        
        
Of about 3-4 days in most cases. With severe damage it can take up to 30. 
 
        
             
        
        
        
Answer:
It's probably 50%
Explanation:
Since Bb is repeated twice, it is 50%. 
Hope this helps!