For this case we have the following equation:

Rewriting we have:

Dividing by 2 to both sides of the equation:

We apply the quadratic formula:

We have to:

Substituting:

Thus, we have two roots:

ANswer:

 
        
             
        
        
        
Answer:
D
Step-by-step explanation:
 
        
             
        
        
        
The sales tax is 2$ Hope this is the answer you're looking for.