3.1 is like a example when it is hiding a zero behind it and you find this when you do a math problem and you don't put zero in front of a number like 100-89 you don't write "011" so that is why it is like that
        
             
        
        
        
Answer: 85 or 85% or 85/100
Step-by-step explanation:
This is because there are a total of 100 squares in the grid, and out of those 100 there are 85 squares shaded in. So the model best represents 85, 85%, or 85/100. These answers are dependent on what choices you have for the possible answer. 
 
        
             
        
        
        
Answer:
4x(10)
Step-by-step explanation:
add 3+7=10
4x is multiplying 3+7=10
4x(10)
 
        
             
        
        
        
Answer
If d equals diameter the radius is 9
Step-by-step explanation: