Cicumference =  Dπ  or  2rπ
thus if r = 2.2 
then C  = 2 (2.2)π
             =  4.4π
D is the answer
        
             
        
        
        
Answer:
The Second One
Step-by-step explanation:
4x+6y <(underlined) 10
 
        
             
        
        
        
Answer:
c/12=d
Step-by-step explanation:
what is the indicated variable?
 
        
                    
             
        
        
        
555 divided by 8 is 69.375 might round up to 69.4
        
                    
             
        
        
        
X² - 3x - 10
x² = x * x
10 can be factored:
1 x 10 ⇒⇒⇒ difference between factors = 9 
2 x 5   ⇒⇒⇒ difference between factors = 3  ⇒ (The correct pair)
(x-5)(x+2) = x(x+2) - 5(x+2) 
                 = x² + 2x - 5x - 10 
                 = x² - 3x - 10
∴ x - 5 = 0  ⇒⇒⇒ x = 5
   x + 2 = 0  ⇒⇒⇒ x = -2