Step-by-step explanation:
a function that describes a set of points in Cartesian space by mapping each x-coordinate to a y-coordinate, then a circle cannot be described by a function because it fails what is known in High School as the vertical line test. A function, by definition, has a unique output for every input.
 
        
                    
             
        
        
        
Answer:
a) Observational Study 
b) Risk in observational study
RR = 9/10/3/10 = 3.0
c) Relative risk when exposed to  a common NSAID is 3 out of 10 people 
Step-by-step explanation:
A) This is observational study 
b) The parameter determined here is the risk in observational study
RR = 9/10/3/10 = 3.0
c) Relative risk of mammalian cell to develop chromosomal abnormalities when exposed to  a common NSAID is 3 out of 10 people 
 
        
             
        
        
        
Answer:
Its enlargement 
Step-by-step explanation:
Its enlargement!
hope it helps
 
        
             
        
        
        
15. 
Step 1: Distribute the subtraction sign to all the numbers in the second set of parentheses...


Step 2: Combine like terms ( 's go with
's go with  's)
's)

 


Step 3: Combine like terms ( 's go with
's go with  's)
's)




Step 4: Combine like terms (normal numbers go with normal numbers)

1 + 2
3

You were correct!
16. 
I don't really know how to explain this one but I got: (7m-6n)(7m-6n)