I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
 
        
                    
             
        
        
        
Answer:
No, they should not raise the price of the cookies. Because they are going to sell more base on the equation above if they stick with the original price.
 
        
             
        
        
        
The sales tax $950 item would be $57. Hope this helps!
        
             
        
        
        
A) 3, 5, 6 
 c squared = a squared + b squared 
 6 squared = 5 squared + 3 squared
 36 = 25 + 9
 36 ≠ 34 (not a right triangle)
b) 13, 12, 5
 c squared = a squared + b squared 
 13 squared = 12 squared + 5 squared 
 169 = 144 + 25
 169 = 169 (is a right triangle) 
c) 17, 15, 9
 c squared = a squared + b squared 
 17 squared = 15 squared + 9 squared 
 289 = 225 + 81
 289 ≠ 306 (not a right triangle) 
d) 12, 8, 6
 c squared = a squared + b squared 
 12 squared = 8 squared + 6 squared 
 144 = 64 + 36
 144 ≠ 100 (not a right triangle) 
hope this helps!!
        
             
        
        
        
I have included the answer in the picture attached below: