Answer:
55
Step-by-step explanation:
Divide both sides by 3.14 to get d by itself.
172.7 / 3.14 = 55 = d
 
        
             
        
        
        
X=2 is the answer for this question.
        
                    
             
        
        
        
Answer:
   C.  1/(x^2 +1) > 0
Step-by-step explanation:
The cube of a negative number is negative, eliminating choices B and D for certain negative values of x.
1/x^2 is undefined for x=0, so cannot be compared to zero.
The value 1/(x^2+1) is positive everywhere, so that is the expression you're looking for.
   1/(x^2 +1) > 0
 
        
             
        
        
        
10
the hypotenuse is the largest side
so out of 6,8,10
10 is the largest