1. C, 4
2. A, 252p/3 cm3
3. C, 18, 432p cm3
4. C, AÖ3/2
5. A, 6 and 5
6. A, 12 sides
7. D, 6
8. A, 30
9. C, 25p
10. A, 48 sq.m
11. D, ellipse
12. A, cardioid
13. D, downward
14. D, circle
15. C, folium of descartes
16. D, (1/3, -5)
17. B, 3x+2y-12 = 0
18. C, directrix
19. B, 3
20. B, Ax2+Dx+Ey+F = 0
21. B, (16, -12)
22. B, 2.67
23. C, arctan 3
24. A, a parabola
25. A, 3/2
26. C, a hyperbola
27. C, m1m2-1
28. B, (1, -3)
29. B, positive
30. D, a hyperbola
31. D, perpendicular
32. B, 3x-4
33. A, 9
34. C, (1, -5/3
35. A, 1/7Ö14
36. C, ellipse
37. C, hyperbola
38. A, ±b/a
39. B, (5, -2)
40. D, (0, -4)
41. B, (2, p/6
42. C, 4x2=y3y=4
43. A, y=4
44. B, (-1, 1), (4,11)
45. C, 30 sq units
46. A, hyperbola
47. B, 5
48. A, r=6csc2q(cosq+sinq)
49. D, rhombus
50. C, 0 < a/b <1
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