Answer:i think its 80 cm
Step-by-step explanation:
 
        
             
        
        
        
Answer:
min f(x) = 3.95  (for x= 2.5) 
Step-by-step explanation:
vertex (x) = 1/0,4 = 2,5 
vertex (y) = 0.2(2.5)^2-2.5+5.2 = 3.95 
 
        
             
        
        
        
Answer:
tan D =  or 0.545
 or 0.545
tan F =  or 1.833
 or 1.833
Step-by-step explanation:
To find tangent is always 
so the opposite of angle D is line EF which is 4.8 and the adjacent side is line ED which is 8.8   so   which is
 which is  or 0.545
 or 0.545
The opposite of angle f is line ED which is 8.8 and the adjacent is line EF which is 4.8 so  is
  is   or 1.833
 or 1.833
 
        
             
        
        
        
Answer:
1/4
Step-by-step explanation: