Answer:
Therefore If you exchange $522 for euros, then we will get 
Step-by-step explanation:
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A rational expression is undefined when the denominator is zero.

is undefined when x=0 or x=2.
 
        
        
        
Let's find the derivative of that hyperbola in order to find a slope formula to help us with this equation.  We already have an x and y value.  The derivative is found this way:  

 so  

.  The derivative supplies us with the slope formula we need to write the equation.  Sub in the x value of 3 to find what the slope is: 

.  So in our slope-intercept equation, x = 3, y = 1, and m = -1/3.  Use these values to solve for b.  

  so b = 2.  The equation, then, for the line tangent to that hyperbola at that given point is 
 
 
        
        
        
Step-by-step explanation:
Recall the Ratio for tan
Tan(theta) = opposite / adjacent
Tan (x) = 9 / 5
solve for x (use Tan^-1(...) )