Answer:
8% tax rate.
Step-by-step explanation:

The 8% (0.08) is the tax rate because the 100%, or 1.00, is the original price of the racket, which was $13.
 
        
                    
             
        
        
        
Given a point in coordinates form 

, one can compute the cartesian form like this:

We have:

We get the cartesian form then:
 
 
        
        
        
Answer: -37 & -3
Step-by-step explanation:
-20-17= -37
-20+17= -3
 
        
             
        
        
        
Estimation would be 90 x 70 
Which is 6300.
Real answer of 92 x 68 
= 6256
 
        
             
        
        
        
Given the ellipsoid 

For the radius in the x-dirextion, y = z = 0, and we have

For the radius in the y-dirextion, x = z = 0, and we have

For the radius in the z-dirextion, x = y = 0, and we have

Thus, the radius of the ellipsoid is given by
