D) Vertices: (1, -1), (-11, -1); Foci: (-15, -1), (5, -1)
 
        
        
        
The area of a circle in terms of the circle's radius 

 is

Differentiating both sides with respect to 

, you get
 
 
        
        
        
<h3>
Answer</h3>
They are being multiplied by 2 each time.
 
        
        
        
As Louis is only leaving a 20% tip on the pretax bill, this means he's leaving 20% of $27.62
The best thing to do is to find 10% and double it.
27.62/10= 2.76 (as it rounds down)
2.76*2= 5.52
Therefore, you've got to add $5.52 to $27.62
$5.52+$27.62= $33.14
Hope this helps :) 
        
             
        
        
        
The unit rate for 5 lb bag is 1.75 lb