Identify and graph the conic section. Label the center and/or vertex as appropriate.4y2 - 4x2 = 36
A. hyperbola; center (0, 0);
(-3, 0), (3, 0)
B. hyperbola; center (0, 0);
(0, -9), (0, 9)
C. circle; center (0, 0)
(-3, 0), (3, 0), (0, -3), (0, 3)
D. hyperbola; center (0, 0);
(0, -3), (0, 3)
Answer: D
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Solve the problem.At time t, the position of a body moving along the s-axis is 
m. Find the body's acceleration each time the velocity is zero.
A. a(6) = 0 m/sec2, a(8) = 0 m/sec2 B. a(12) = 72 m/sec2, a(16) = 12 m/sec2 C. a(6) = 6 m/sec2, a(8) = -6 m/sec2 D. a(6) = -6 m/sec2, a(8) = 6 m/sec2
Solve the inequality. Graph your solution on a number line, and write your solution in interval notation.-(-6x - 8) - 8 + 4x < 8x
A. (-?, 8) 
B. (8, ?) 
C. (0, ?)
D. (-?, 0) 
Simplify.(-i)31
A. -i B. 1 C. i D. -1
Decide whether or not the points are the vertices of a right triangle.(-8, 9), (1, 9), (1, 12)
A. Yes B. No