Solutions

Solutions to Try Its

1. 1283

2. 92

3. x = 20

Solutions to Odd-Numbered Exercises

1. The graph will have the appearance of a power function.

3. No. Multiple variables may jointly vary.

5. y=5x2

7. y=10x3

9. y=6x4

11. y=18x2

13. y=81x4

15. y=203x

17. y=10xzw

19. y=10xz

21. y=4xzw

23. y=40xzwt2

25. y=256

27. y=6

29. y=6

31. y=27

33. y=3

35. y=18

37. y=90

39. y=812

41. y=34x2
Graph of y=3/4(x^2).

43. y=13x
Graph of y=1/3sqrt(x).

45. y=4x2
Graph of y=4/(x^2).

47. 1.89 years

49. 0.61 years

51. 3 seconds

53. 48 inches

55. 49.75 pounds

57. 33.33 amperes

59. 2.88 inches