Answer:
   5000
Step-by-step explanation:
In vertex form, the cost function is ...
   C(x) = 3(x² -10x) +175 = 3(x² -10x +25) +175 -3(25)
   C(x) = 3(x -5)² +100
The vertex is at x=5, so the cost function will be minimized when 5000 speed boats are produced.
 
        
             
        
        
        
Answer: the width is 150
Step-by-step explanation:
 
        
             
        
        
        
Answer:yes
Step-by-step explanation:
 
        
                    
             
        
        
        
A trapezoid is a rectangle.