Answer:
The correct option is A = adiant negy.
 
        
             
        
        
        
The independent variable would be the fertilizer as it is what the dependent variable (the growth of grass) depends on.
        
             
        
        
        
Answer:
The astronauts are separated by 28 m.
Explanation:
The separation of the astronauts can be found by conservation of linear momentum:



 
 

Now, the distance (x) is:       
 
  
The distance traveled by the astronaut 1 is:
 (1)
    (1)
And, the distance traveled by the astronaut 2 is:
 (2)
  (2)
From the above equation we have:   
 (3)
    (3)                                    
By entering equation (3) into (1) we have:     
 
 
 
     
The minus sign is because astronaut 1 is moving in the opposite direction of the astronaut 2.      
Finally, the separation of the astronauts is:
 
 
Therefore, the astronauts are separated by 28 m.
    
I hope it helps you!
 
        
             
        
        
        
You say 42m/s times (7s) the answer is 294m/s2 squares cause you times not sure but I am just a nice er at this sry if it’s wrong :)