The answer is the top one
        
             
        
        
        
You are multiplying 2 to each term each time.
-40 is the 4th term
-40 x 2 = -80
-80 x 2 = - 160
-160 x 2 = -320
-320 x 2 = -640
-640 x 2 = -1280
-1280 x 2 = -2560
-2560 x 2 = -5120
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-5120 is your 11th term.
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hope this helps
 
        
                    
             
        
        
        
For this case we have the following functions:

By definition of composition of functions we have:

Then substituting:

So:

Answer:

 
        
             
        
        
        
Some triangles can have a right angle, but not all triangles are right angles. If a triangle has a right angle, it has one angle of 90°. Triangles have a total of 180°. 
Hope this helps! :)