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Math Help - three significant numbers

  1. #1
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    three significant numbers

    Can someone tell me the three significant numbers for these below:

    I have a 100 of these to do, can someone start me of so that i can get an idea of how to do them. Thanks

    1) 34.33333
    2) 0.031968
    3) 0.268632
    4) 0.464704
    5) 0.731368
    6) 0.266664
    7) 0.430167
    8) 0.469273
    9) 0.581395
    10) 0.406779

    If you need to round your answer, please give at least 3 significant figures after the decimal point and any initial zeros. E.g. 3.000346.
    Last edited by datboiantonio; October 18th 2009 at 06:43 AM.
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  2. #2
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    tell me if i got these right please:

    1) 34.33333 - 34.333
    2) 0.031968 - 0.0319
    3) 0.268632 - 0.268
    4) 0.464704 - 0.464
    5) 0.731368 - 0.731
    6) 0.266664 - 0.266
    7) 0.430167 - 0.430
    8) 0.469273 - 0.469
    9) 0.581395 - 0.581
    10) 0.406779 - 0.406
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  3. #3
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    Quote Originally Posted by datboiantonio View Post
    Can someone tell me the three significant numbers for these below:

    I have a 100 of these to do, can someone start me of so that i can get an idea of how to do them. Thanks

    1) 34.33333 34.3
    2) 0.031968 0.0320
    3) 0.268632 0.269
    4) 0.464704 0.465
    5) 0.731368 0.731
    6) 0.266664 0.267
    7) 0.430167 0.430
    8) 0.469273 0.469
    9) 0.581395 0.581
    10) 0.406779 0.407
    HI

    see quote .
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  4. #4
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    The best thing to do is to write the numbers in scientific notation- that's where "significant figures" is most useful.

    In scientific notation, 34.33333 is 3.433333 \times 10^1. Now round off to the second decimal place.

    In scientific notation, 0.031968 is 3.1968 \times 10^{-2}. Now round of to thesecond decimal place.
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  5. #5
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    Quote Originally Posted by datboiantonio View Post
    Can someone tell me the three significant numbers for these below:

    I have a 100 of these to do, can someone start me of so that i can get an idea of how to do them. Thanks

    1) 34.33333
    2) 0.031968
    3) 0.268632
    4) 0.464704
    5) 0.731368
    6) 0.266664
    7) 0.430167
    8) 0.469273
    9) 0.581395
    10) 0.406779

    Basically, significant figures refer to the first n digits starting from the first non-zero.
    The first post gave you 3 significant figures for those ten. Just note the first 3, they will cover most scenario's.
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