Find the center, foci, and vertices of the ellipse.
+ 
= 1
A. center at (0, 0)
foci at (0, - 3
) and (0, 3
)
vertices at (0, -6), (0, 6)
B. center at (0, 0)
foci at (0, -6) and (0, 6)
vertices at (0, -36), (0, 36)
C. center at (0, 0)
foci at (0, 6) and (3, 0)
vertices at (0, 36), (9, 0)
D. center at (0, 0)
foci at (- 3
, 0) and (3
, 0)
vertices at (-6, 0), (6, 0)
Answer: A
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Solve the problem.A promotional deal for long distance phone service charges a $15 basic fee plus $0.05 per minute for all calls. If Joe's phone bill was $47 under this promotional deal, how many minutes of phone calls did he make? Round to the nearest integer, if necessary.
A. 2 min B. 640 min C. 6 min D. 1240 min
Solve the problem.A company has three factories I, II, and III. Each factory employs both skilled and unskilled worker. The break down of the number of workers by type in the three factories is summarized by matrix A below. The hourly wage of the skilled worker is $15 and that of the unskilled worker is $10. Multiply appropriate matrices and compute the total hourly pay at each factory. 
A =
?
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Complete the ordered pairs for the given linear equation. Then plot the points and graph the equation by connecting the points.y = 
x + 2(0, ), (3, ), (-3, )
A. (0, -2), (3, 3), (-3, -7)
B. (0, 0), (3, 5), (-3, -5)
C. (0, 2), (3, 7), (-3, -3)
D. (0, 2), (3, -3), (-3, 7)
Indicate whether the graph of the equation is a circle, an ellipse, a hyperbola, or a parabola. Then graph the conic section.
+ 
= 1
A. parabola
B. ellipse
C. hyperbola
D. circle