Hello : 
<span>If f(x)=  3 ^x-1+ 4 and g(x) = 4x-7 
 (f-g)(x) = f(x) - g(x)= </span>3 ^x-1+ 4  - (4x - 7) 
(f-g)(x) =3 ^x-1-4x +11.....( answer : a)
        
                    
             
        
        
        
Total liters of water needed = number of attendee x water                            consumption/attendee wherenumber of attendee = 7000 attendeewater consumption/attendee = 0.5litre of water/attendeetotal = 7000 x 0.5 litre        = 3500 litrescomputing the water requirement per 200 litre containerwater requirement in the event = 3500 litres/200 litre /container                                                  = 17.5 containersThe water requirement in the event at the arena of 7000 attendees is 17.5 containers. 
        
             
        
        
        
That you and her have a 50% chance of winning.