Find an equation for the hyperbola described. Graph the equation.Center at (0, 0); vertex at (0, 2); focus at (0, 
)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Answer: A
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Solve.The sales for a gaming console for various years are listed in the table below. 
Let s represent the sales (in billions of dollars) at t years since 1995. A reasonable model is 
Use the model to predict sales in 2011.
A. $7.16 billion B. $6.41 billion C. $7.71 billion D. $5.85 billion
Simplify the complex rational expression.
A. 
B. 
C. 
D. 
Graph f on the interval [-2?, 2?] using dot mode.f(t) = sec 4t 
A. 
B. 
C. 
D. 
Solve the problem.The sum of the measures of the angles of any triangle is 180°. In triangle ABC, angles A and B have the same measure, while the measure of angle C is 90° larger than each of A and B. What are the measures of the three angles?
A. A and B: 120°; C: 30° B. A and B: 30°; C: 120° C. A and C: 100°; B: 40° D. A and B: 40°; C: 100°