Answer:
38
Step-by-step explanation:
Follow orders of operations. 
Slove the expression in the parenthesis or brackets whatever, same thing.
5*6=30
Now add 
30+8=38
 
        
                    
             
        
        
        
Diameter is 2r, or 18.8 ft
Circumference is 2*pi*r, or 59.1 ft
        
                    
             
        
        
        
Make two equations from the information. Then graph them and see where they intersect. The answer is 62 miles. Plug 62 back into both equations and they should both be the same number.
 
        
        
        
  The percent equivalent to 1 / 4 = 25 %.
  The percent equivalent to 3 / 4 = 75 %.
   25 %  x  3  = 75 %   ( correct )
        
             
        
        
        
Answer:
15
Step-by-step explanation:
15 is 5 * 3 so is not prime.