Hi i a doing the same thing and i have the answer as a hope this helps
        
             
        
        
        
Ahh... this is pretty easy!!
.
Locomotive is 40 feet.
.
Model is 16.
.
So?
.
Divide 40 by 16!!
.
What's that?
.
2.5. 
.
So your answer choice is 2.5
.
Hope I helped!!
        
             
        
        
        
B is the only number that is divisible by 3
        
             
        
        
        
Answer:
-0.2z
Step-by-step explanation:
0.4z-0.6z
-0.2z