Answer:
a)
b)d(t)=500t
c)
Step-by-step explanation:
d = Horizontal distance 
s = the distance between the plane and the radar station
The horizontal distance (d), the one mile altitude, and s form a right triangle.
So, use Pythagoras theorem 


a) 
(b) Express d as a function of the time t (in hours) that the plane has flown.

d(t)=500t
(c) Use composition to express s as a function of t.

using b

 
        
             
        
        
        
Answer:
1.28 ÷ 4 = 0.32
But the "models" make little or no sense.  I can see the three bars and two dots representing the digits 3 and 2, but that is the only image I see, repeated three times.  It also shows no reference to the decimal place, so I would say there is no real representation of it all.
 
        
             
        
        
        
Answer:
2
Step-by-step explanation:
not needed
 
        
                    
             
        
        
        
Answer:
B. 5=5 
Step-by-step explanation:
 
        
             
        
        
        
Center: 0,0
vertex: 5,0
vertex2 (-5,0)