Chapter 10: Q. 37 (page 668)
In Problems 37–40, write an equation for each hyperbola.

Short Answer
Equation of hyperbola is:
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Chapter 10: Q. 37 (page 668)
In Problems 37–40, write an equation for each hyperbola.

Equation of hyperbola is:
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In Problems 43–52, identify the graph of each equation without applying a rotation of axes.
Find an equation for each ellipse. Graph the equation by hand.
Center at : vertex at : focus at.
In Problems 43–52, identify the graph of each equation without applying a rotation of axes.
Lightning Strikes Suppose that two people standing mile apart both see a flash of lightning. After a period of time, the first person standing at point hears the thunder. Two seconds later, the second person standing at point hears the thunder. If the person at point is due west of the person at point and if the lightning strike is known to occur due north of the person standing at point , where did the lightning strike occur?
Answer Problem using the figure.
If a = 4, then the coordinates of the focus are___________.
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