# College algebra : with applications for business and the by Larson

By Larson

Collage Algebra With functions For enterprise And The existence Sciences Instructor's Annotated variation (Hardcover)

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Additional resources for College algebra : with applications for business and the life sciences : Instructor's annotated edition

Example text

5y ΃ 54. ΂2zy ΃ Ϫ3 4 Ϫ3 2 Ϫ2 In Exercises 55–60, write the number in scientific notation. x ϭ Ϫ7 55. Land Area of Earth: 57,300,000 square miles In Exercises 25–44, simplify the expression. 56. Water Area of Earth: 139,500,000 square miles 25. ͑Ϫ5z͒ 26. ͑Ϫ2w͒ 57. Light Year: 9,460,000,000,000 kilometers 27. ͑8x4͒͑2x3͒ 28. 5x4͑x2͒ 58. 0000000000000003 gram 29. 10͑x2͒2 30. ͑4x 4͒3 59. 0000001 meter 31. ͑Ϫz͒3͑3z4͒ 32. ͑6y 2͒͑2y 3͒3 60. 00003937 inch 3 5 Fundamental Concepts of Algebra 67. 0052 68.

12 Ϫ 13 ͒ Ϭ 16 Ϫ2 In Exercises 21–24, evaluate the expression for the indicated value of x. 21. ϩ 12 Ϫ 56 43. 3n и 32n 20. ͑Ϫ2͒0 19. com for worked-out solutions to odd-numbered exercises. In Exercises 1–20, evaluate the expression. Write fractional answers in simplest form. 1. 22 и 24 ͑14 ͒͑5͒͑4͒ 11͑14 ͒ ϩ 54 Ϫ2 52. ΂5y ΃ 54. ΂2zy ΃ Ϫ3 4 Ϫ3 2 Ϫ2 In Exercises 55–60, write the number in scientific notation. x ϭ Ϫ7 55. Land Area of Earth: 57,300,000 square miles In Exercises 25–44, simplify the expression.

In the formula for compound interest, n is the number of compoundings per year. Make sure you convert all units of time t to years. For instance, 6 months ϭ 12 year. So, t ϭ 12. Example 8 Finding the Balance in an Account MAKE A DECISION You are trying to decide how to invest \$5000 for 10 years. Which savings plan will earn more money? a. 4% simple annual interest b. 5% interest compounded quarterly SOLUTION a. 04͑10͔͒ ϭ \$7000. b. 54. 54. So, plan (b) will earn more money. 4% annual interest compounded monthly?