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1. Which of the following is the correct graph for x ≥ 3 or x ≤ -2?

1. Which of the following is the correct graph for x ≥ 3 or x ≤ -2?. D. 2. A scale on a map states that every ¼ of an inch represents 20 miles. If two cities are 3 ½ inches apart, how many miles are actually between the two cities?.

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1. Which of the following is the correct graph for x ≥ 3 or x ≤ -2?

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  1. 1. Which of the following is the correct graph for x ≥ 3 or x ≤ -2? D 2. A scale on a map states that every ¼ of an inch represents 20 miles. If two cities are 3 ½ inches apart, how many miles are actually between the two cities? A. 14 miles B. 20 miles C. 125 miles D. 230 miles E. 280 miles E A. 2 LW B. 2 (L+W) C. 2L +2W D. (L+2) (W+2) E. LW/2 3. Michelle wants to expand her flowerbed by increasing the length and width each by 2 ft. What will the new area of the flowerbed be, if L and W represent the original dimensions of the flowerbed's length and width? D

  2. Warm-Up 3/16/10 1) Write in exponential form. 2) Write in logarithmic form. 3) Simplify. 4) Simplify. 5) Simplify.

  3. Agenda March 2010 WEB 3/17/10 More Properties of Logs • Warm-Up • Notes: Properties of Logarithms • HW Thu 3/18/10 Solve Equations Fri 3/19/10 More Solve Equations Thursday, March 25 Mid-Semester Quiz Chapters 6-8 MUST be made up if missed!

  4. 8.5Properties of logarithms p. 493

  5. Properties of Logarithms loga1 = 0 because a0 = 1 logaa = 1 because a1 = a logaax = x If loga x= loga y then x =y We’ll add more tomorrow!

  6. Use a property of a log to evaluate the expression ? Can we rewrite 27 as 3 to some exponent? Can we rewrite again? What’s the answer? What should we have done with the exponents we found originally?

  7. Homework Problems– Pg 496: 14-29 ALL Use a property of logarithms to evaluate the expression

  8. Use a calculator to evaluate the expression. Round to 3 decimal places. Directions are different from book!!!!!

  9. Change-of-Base this allows us to change from any base to base 10 or base e and use the calculator

  10. Evaluate. Round to four decimal places. = 1.7712 Be careful about the parenthesis in the calculator… log(7) / log(3)

  11. Evaluate. Round to four decimal places. = 0.2626

  12. Homework Problems– Pg 496: 64-73 ALL Use a the change-of-base formula to evaluate the expression

  13. Assignment Page 496 #14-29 ALL; # 64-73 ALL

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