Answer:
option B : 
Step-by-step explanation:
(a) 
For exponential function , there is no vertical asymptotes
General form of exponential function is 


In the given f(x) the value of k =0
So horizontal asymptote is y=0
(b) lets check with option 

To find vertical asymptote we set the argument of log =0  and solve for x
Argument of log is x-39
x-39=0 so x=39
Hence vertical asymptote at x=39
 
        
                    
             
        
        
        
Show the graphs so we can see
        
             
        
        
        
Answer:
1
Step-by-step explanation:
f(-2)=-2x-3
plug in the -2
f(-2)= -2(-2) -3
multiply it out
f(-2)= 4-3
subtract
f(-2)= 1