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Numbers and Their Application to Math and Science

Homework for Numbers Lesson 9

  1. Using your calculator result for 69! in scientific notation, multiply 69! by 7 and approximate 70! also in scientific notation.

     

    Round each measurements to the number of significant figures shown in parentheses. Write your answer in scientific notation.

  2. 314.721 m (4)

  3. 0.001775 m (2)

  4. 64.32 × 10-1 m (1)

  5. 8792 m (2)

  6. 87.073 m (3)

  7. 4.3621 ×108 m (1)

     

     

    Do the following operations and give the answer to the correct number of significant figures.

  8. 74.626 m - 28.34 m

  9. 61.2 m + 9.35 m + 8.6 m

  10. 9.44 m - 2.11 m

  11. 1.36 m + 10.17 m

  12. 34.61 m - 17.3 m

  13. 2.10 m × 0.70 m

  14. 2.4526 m ÷ 8.4

  15. 0.365 m ÷ 0.0200

  16. (1.8 ×10-3m) ×(2.9 × 10-2m)

  17. 5.3 × 10-2m ÷ 0.255

     

     

  18. The five students at table #2 obtained the following measurements for the length of a 12-inch ruler in centimeters (four groups tried it 4 times). Determine whether each student's measurements were accurate and/or precise.

    StudentAudrey/RashmiBeckyCamiKara
    Measurements
    31.5
    31.4
    31.6
    31.4
    30.4
    30.5
    30.3
    30.4
    30.12
    30.25
    30.18
    30.17
    28.5
    28.9
    28.7
    28.6
    Accuracy___Good  ___Poor___Good  ___Poor ___Good  ___Poor___Good  ___Poor
    Precision___Good  ___Poor___Good  ___Poor ___Good  ___Poor___Good  ___Poor

  19. Identify the exponent for the power of ten multiplier for each of the following metric prefixes. (Hint: they are in order and all the missings ones are multiples of three.)

        Prefix     times 10?
    peta- 15
    tera-  
    giga-  
    mega-  
    kilo-  
    deci- -1
    centi- -2
    milli-  
    micro-  
    nano-  
    pico-  
    femto-  
    atto- -18
    zepto- -21

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