Find the vertices and foci of the given ellipse.81x2 + 16y2 = 1296
A. Vertices: (0, 9) and (0, -9);
Foci: (0, 
) and (0, -
)
B. Vertices: (0, 81) and (0, -81);
Foci: (0, 9) and (0, -9)
C. Vertices: (9, 0), (-9, 0);
Foci: (
, 0) and (-
, 0)
D. Vertices: (0, 81) and (16, 0);
Foci: (0, 9) and (4, 0)
Answer: A
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A. 30 B. 10 C. 60 D. 90
Find the indicated probability. Round your answer to 6 decimal places when necessary.You are dealt two cards successively (without replacement) from a shuffled deck of 52 playing cards. Find the probability that the first card is a king and the second card is a queen.
A. 
B. 
C. 
D. 
Give the center and radius of the circle. Then sketch its graph.(x + 5)2 + (y + 1)2 = 16
A. center (- 5, - 1), r = 4
B. center (5, - 1), r = 4
C. center (5, 1), r = 4
D. center (- 5, 1), r = 4
Decide whether the expression has been simplified correctly.(ab)8 = a8b8
A. Yes B. No