Answer:
200 ft squared of   W I N E
Step-by-step explanation:
W I N E
 
        
             
        
        
        

 has gradient
 has gradient

which at the point (-1, 4, 3) has a value of

I'm not sure what the given direction vector is supposed to be, but my best guess is that it's intended to say  , in which case we have
, in which case we have

Then the derivative of  at (-1, 4, 3) in the direction of
 at (-1, 4, 3) in the direction of  is
 is

 
        
             
        
        
        
3a to the power of 2 plus 5a minus 2
        
             
        
        
        
It would be 7:9 because if you divide each side by 4 then you can get it in simplest form