Answer:
2
Step-by-step explanation:
a negative x negative is always a positive
a negative x positive is negative
a positive x positive is negative
 
        
                    
             
        
        
        
Answer:
The molecules become more active and it expands.
Step-by-step explanation:
 
        
                    
             
        
        
        
Ratio of orange:green = 2:1
If there are 4 green picks then there are 8 orange picks. 
Total number of picks = 4 + 8 = 12
Answer: There are now 12 picks in total.