Answer:
circumference = 97.34
Step-by-step explanation:
circumference = diameter x Pi
31 x 3.14 = 97.34 inches
 
        
                    
             
        
        
        
Answer:
100300
Step-by-step explanation:
 
        
             
        
        
        
Answer: Ken Earned 81$
Step-by-step explanation: Subtract 12 from the total, then divide by 2 because his wife earns double than him, plus 12$ more.
Have a good day :)
 
        
             
        
        
        
The root 

 can be converted into the power 

. Therefore we can rewrite the problem as 

 and then follow the exponent rules about a power to a power, multiplying 1/2 and 3/4 together.
Thus the problem becomes 

, which then can be turned into 
![\sqrt[8]{10} ^{3x}](https://tex.z-dn.net/?f=%20%5Csqrt%5B8%5D%7B10%7D%20%5E%7B3x%7D)
, making the last option our answer.