Al you have to do is add 4 to the equation
This gives you g(x)=4x^2+9 which is your answer
        
                    
             
        
        
        
Answer:
46.6 ft/sec (to the nearest tenth)
Step-by-step explanation:
There's a common identity useful here:  60 mph = 88 ft/sec.
Mult. 31.8 mph by the conversion factor (88 ft/sec) / (60 mph), obtaining:
46.64 ft/sec.