2(x+1)
2x+2 is your final answer
        
             
        
        
        
Answer:
d =   5,35 ft
Step-by-step explanation: See annex
Figure in  annex is clear,  
sin ∠42⁰  = d / 8
And 
sin ∠42⁰   =  0.669
d/8   =  0,669
d  =  0,669*8  
d =   5,35 ft
 
        
                    
             
        
        
        
Answer with Step-by-step explanation:
We are given that a function f(x) is continuous on ( ).
).
1.f'(-1)=0 and f''(-1)=-7
We have to find information about f.
When f'(-1)=0 and f''(-1)=-7 < 0
Then, function is maximum at x=-1.
Therefore, at x=-1, f has local maximum.
Answer:a)at x=-1 ,f has local maximum.
2.) if f'(4)=0 and f''(4)=0 
We know that when f''(x)=0 then test fails  then the function has not maximum or minimum.
Therefore, at x=4 , f has not a maximum or minimum.
Answer:c) at x=4, f has not a maximum or minimum.