Hi there. 
Factor 
4d + 12 
4( d + 3)
I hope that's help !  
        
             
        
        
        
I think it’s b but I’m not sure
        
             
        
        
        
Answer:
80,000
Step-by-step explanation:
because you are just adding a extra zero
 
        
             
        
        
        
Answer:
question 13 = D
Step-by-step explanation:
because you do some math, open a calculator and boom, you have that.