The area of a circle in terms of the circle's radius 

 is

Differentiating both sides with respect to 

, you get
 
 
        
        
        
2 dollars per minute? The question isn't really very clear...
        
                    
             
        
        
        
Answer: 2/3
Explanation: the difference between -14 and -10 is 4 and in fractions x/y. so we have 4/y. the difference between -18 and -12 is 6 so we have 4/6 but we can simplify that to 2/3.
        
                    
             
        
        
        
Answer:
x= - 2
Step-by-step explanation:
hello : 
note : the equation of the axis symmetry  for the parabola : y =ax²+bx+c
when :  a≠ 0 is : x=- b/2a
in this exercice : a=1  and b=10
so : x= -10/2 = -5