Answer: 5 seconds
<u>Step-by-step explanation:</u>
Maximum height is the y-value of the vertex. The number of seconds at maximum height is the x-value (aka axis of symmetry).
h(x) = -2x² + 20x + 48
       a=-2    b=20   c=48
Axis of symmetry: x = 
                                  = 
                                  = 
                                  = 5
      
 
        
                    
             
        
        
        
A, B, D, and E are correct.
What makes these a function and the others not is that for each x value, there is only one y value. For C, for example, there are multiple y values for the x value of -2. The same goes for F.
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
 
        
             
        
        
        
Answer:
218,900
Step-by-step explanation:
 
        
             
        
        
        
Example A means
For every #of felt pieces you multiply that by the cost of one piece of felt to see how much you spent
Example
Felts cost $3 a piece
You get 7 pieces
7 x 3= 21
You spent $21 on felt