By Laurie Boswell, Timothy D. Kanold, Lee Stiff, Holt Mcdougal

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D º 3)2 when d = 13 46. 16 + x 3 when x = 2 Chapter 1 Connections to Algebra EVALUATING POWERS Use a calculator to evaluate the power. For keystroke help see Student Help box on page 11. 47. 95 48. 210 49. 59 50. 311 51. 86 52. 127 53. 68 54. 135 EXPONENTIAL EXPRESSIONS Evaluate the expression for the given value of the variable. 55. (5w)3 when w = 5 56. 6t 4 when t = 3 57. 7b2 when b = 7 58. 2x 2 when x = 15 59. (8x)3 when x = 2 60. 5y5 when y = 2 61. USING A TABLE The area of a square is s2.

Solve the inequality. com for help with problem solving in Exs. 69–76. APPLYING FORMULAS In Exercises 69–76, match the problem with the formula needed to solve the problem. Then use the Guess, Check, and Revise strategy or another problem-solving strategy to solve the problem. Area of a rectangle A = lw Distance d = rt Simple interest I = Prt Volume of a cube V = s3 Temperature C = ᎏᎏ(F º 32) Surface area of a cube S = 6s2 5 9 69. What is the average speed of a runner who completes a 10,000-meter race in 25 minutes?

APPLYING FORMULAS In Exercises 69–76, match the problem with the formula needed to solve the problem. Then use the Guess, Check, and Revise strategy or another problem-solving strategy to solve the problem. Area of a rectangle A = lw Distance d = rt Simple interest I = Prt Volume of a cube V = s3 Temperature C = ᎏᎏ(F º 32) Surface area of a cube S = 6s2 5 9 69. What is the average speed of a runner who completes a 10,000-meter race in 25 minutes? 70. How long must $1000 be invested at an annual interest rate of 3% to earn $300 in simple interest?