A. I Believe because Data is collected by sample?
        
             
        
        
        
Let's say the first truck weighs x tons
Then, the weight of 2nd truck = x+2 tons
The weight of 3rd truck = (x + 2) + 2 = x+4 tons
The weight of 4th truck = (x + 4) + 2 = x+6 tons
Total weight of 4 trucks:
x + (x+2) + (x+4) + (x+6) = 32
  
which can be solved easily to give x = 5
 
        
             
        
        
        
Answer:
A
Step-by-step explanation:
A) r = 8
B) r = 4
C) r =  ~ 3.09
 ~ 3.09
D) r =  
 
Circle A has the largest radius, and thus is the largest circle
 
        
             
        
        
        
You have to convert millimeters in meters, 1000 mm = 1 m, 
6000 mm = 6 m
6 m is your answer.