Answer:
you're correct! :)
Step-by-step explanation:
 
        
                    
             
        
        
        
The maximum height is 144 feet.
The maximum height is the y-coordinate of the vertex.  To find the vertex, we first use x = -b/2a.  For our information, that is x=-64/2(-16) = -64/-32 = 2.
Now we substitute this into the equation:
y = -16(2²) + 64(2) + 80 = -64 + 128 + 80 = 144
        
             
        
        
        
Answer:
what are you talking BOUT?
Step-by-step explanation:
 
        
             
        
        
        
4-3<9
5-3<9
6-3<9
and so on...
        
             
        
        
        
4 is b( do on your calculator)
5 is b(do on your calculator) 
6 is a