C 17/2 hope this helps you
        
             
        
        
        
1
The variable in this case is v, and no coefficient is given, so it can be assumed to be 1.
        
                    
             
        
        
        
Yes it is greater, 1/4 would be a v shape. the question is 90 degrees the other is approximately 25 degrees. hope this helps!
        
             
        
        
        
Answer:
Scenario A: Survey
Scenario B: Observational Studies
Scenario C: Experiment
Scenario D: Survey
If it not the answer you can correct me
 
        
             
        
        
        
Answer:
Step-by-step explanation:
4)  C looks pretty good
5)  D looks great  
:)   ask if you'd like to know how I figured that out