Answer: 14.33
Step-by-step explanation:
 
        
                    
             
        
        
        
Answer:
The correct answer is 450°, 810°, -270° and -630°.  
Step-by-step explanation:
According to the given scenario, the calculation of the two positive angles and two negative angles i.e. coterminal is as follows:
The coterminal angles are the angles in which the difference could be 360 degrees or the multiples of 360 degrees 
For 90 degrees, the two positive angles are
a. 90° + 360°
= 450°
450° + 360°
= 810°
b. The two negative angles are
= 90° - 360°
= -270°
-270° - 360°
= -630°
 
        
             
        
        
        
<span> For this case we can make the following rule of three:
 2.99 ----------> 100%
 x --------------> 7%
 From here, we clear the value of x.
 We have then:
</span> 

<span> Rewriting the expression we have:
</span> 

<span>
 Answer: The sales taxes are: x = 0.2093 $</span>