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Do Now 2/1/10. Copy HW in your planner. Text p. 492, #10-48 evens In your notebook, complete the “Investigating Algebra” Activity on page 488 in the text. Copy and complete both tables and then answer the Draw Conclusions problems #1-8. You will have 10 minutes to finish. Chapter 8.

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## Do Now 2/1/10

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**Do Now 2/1/10**• Copy HW in your planner. • Text p. 492, #10-48 evens • In your notebook, complete the “Investigating Algebra” Activity on page 488 in the text. Copy and complete both tables and then answer the Draw Conclusions problems #1-8. You will have 10 minutes to finish.**Chapter 8**“Exponents and Exponential Functions” • (8.1) Exponents involving products • (8.2) Exponents involving quotients • (8.3) Zero and negative exponents • (8.4) Scientific notation**Objective**• SWBAT use properties of exponents involving products**REVIEW**POWER an expression that represents repeated multiplication. 4 Product 2 EXPONENT Words two to the fourth power BASE**3. d4 whend =**1 1 1 1 1 4 ( ) 1 3. d4 = 3 3 3 3 3 3 =8 8 8 = 1 = 81 GUIDED PRACTICE REVIEW Evaluate the expression. 1. x3 whenx = 8 2. k3 whenk = 2.5 SOLUTIONS 1. x3 = 83 2. k3 =2.53 = (2.5)(2.5)(2.5) = 15.625 = 512**Section 8.1, “Apply Exponent Properties Involving**Products” • (1) Product of Powers Property • (2) Power of a Power Property • (3) Power of a Product Property**Try It Out...**• (1) Product of Powers Property**Try It Out...**• (2) Power of a Power Property**Try It Out...**• (3) Power of a Product Property**Order of Magnitude**the power of 10 nearest to the quantity There are about 91,000 species of insect in the United States. What is the order of magnitude of the amount of insects in the United States? **HINT** Think of the order of magnitude as rounding to the closest power of 10. The power of 10 closest to 91,000 is 100,000 or 10 to the 5th power.**Try It Out...**• Use All Three Properties • Challenge**1) exponent: 8, base: 13**2) power 3) 100 4) 27 5) 25/36 6) 1/8 7) 6.01, 6.12, 6.2 8) 0.0098, 0.073, 0.101 9) 0.04 10) 0.005 11) 0.138 12) 1.45 13) f(x) = x + 2 HomeworkPrerequisite Skills Text p. 486, #1-13 all

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