Answer:
C) 
Step-by-step explanation:
0.51 repeating decimal
x= 0.51515151
multiply by 100 on both sides
100x = 51.515151.........
      x=    0.515151...............
--------------------------------------------(subtract)
    99x = 51
divide by 99 on both sides

divide both sides by 3

 
        
             
        
        
        
The answer is D because side 3 is to far from side 1 and side 2 because you cant make a triangle out of those measurements
Here's a tip
if the sum of side 1 and side 2 are greater than side 3 then it forms a triangle
        
                    
             
        
        
        
Answer:
I think it's 2.56
you convert the 8 percent to a decimal and then you times it to 3.20 
3.20×.8=2.56 (it's wrong)