Neglecting friction and air resistance, the first hill must be built 4 times higher than it is now.
        
             
        
        
        
Answer:
The false statement has to be that neruotransmitters are in the spinal cord.
Explanation:
Neruotransmitters are in no was associated with the spinal cord. That is more related to nerves and muscles. Neurotransmitters are in the Phasma Membrane acording to sciencedirect.com. 
 
        
             
        
        
        
It would be d and c hoped i helped!
        
             
        
        
        
The total distance you haved walked should be 2.6 miles