Chapter 7 Exponents and Exponential Functions

Chapter 7 Get Ready!

• Skills Handbook, page 790 Converting Fractions to Decimals

  Write as a decimal.

  1. 7 10 7 tenths
  2. 6 2 5 6 , and 2 fifths
  3. 8 1000 8 over 1000
  4. 7 2 7 halves
  5. 3 11 3 elevenths

• Lesson 1-2 Using Order of Operations

  Simplify each expression.

  6. ( 9 ÷ 3 + 4 ) 2 open 9 divides 3 plus 4 close squared
  7. 5 + ( 0.3 ) 2 5 plus . open 0.3 close squared
  8. 3 − ( 1.5 ) 2 3 minus . open 1.5 close squared
  9. 64 ÷ 2 4 64 divides , 2 to the fourth
  10. 4 ÷ ( 0.5 ) 2 4 divides . open 0.5 close squared
  11. ( 0.25 ) 4 2 open , 0.25 , close , 4 squared
  12. 2 ( 3 + 7 ) 3 2 . open 3 plus 7 close cubed
  13. − 3 ( 4 + 6 ÷ 2 ) 2 negative 3 . open 4 plus 6 divides 2 close squared

• Lesson 1-2 Evaluating Expressions

  Evaluate each expression for a = − 2 eh equals negative 2  and b = 5 . b equals 5 .

  14. ( a b ) 2 open eh b close squared
  15. ( a − b ) 2 open eh minus b close squared
  16. a 3 + b 3 eh cubed , plus , b cubed
  17. b − ( 3 a ) 2 b minus . open 3 eh close squared

• Lesson 2-10 Finding Percent Change

  Tell whether each percent change is an increase or decrease. Then find the percent change. Round to the nearest percent.

  18. $15 to $20
  19. $20 to $15
  20. $600 to $500
  21. $2000 to $2100

• Lesson 4-6 Understanding Domain and Range

  Find the range of each function with domain { − 2 , 0 , 3.5 } . left brace negative 2 comma 0 comma 3.5 right brace .

  22. f ( x ) = − 2 x 2 f open x close equals . negative 2 x squared
  23. g ( x ) = 10 − x 3 g open x close equals 10 minus , x cubed
  24. y = 5 x − 1 y equals 5 x minus 1

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