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Charmi Group Title

Round off the following numbers to two significant digits. (a) 7.8361 (b) 85.51 (c) 2.85 (d) 9.865 (e) 4.67 (f) 2.75 (g) 6.750 (h) 490.0 (i) 0.006 070 (j) 648 700 (k) 704 (l) 0.599 0 (m) 435 (n) 0.000 16 (o) 0.032 45 (p) 6 807 (q) 0.000 053 (r) 0.070 40 (s) 68 (t) 0.080 5

  • 2 years ago
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  1. Charmi Group Title
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    someone tell me how to do this

    • 2 years ago
  2. Denebel Group Title
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    http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch1/sigfigs.html

    • 2 years ago
  3. Agentjamesbond007 Group Title
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    2 significant digits means x.xx (2 numbers after the decimal point; even if it is a while number). Simply round from the numbers right to left and stop after the 3rd digit after the decimal place. Example: rounding 3.7456 would be 3.75

    • 2 years ago
  4. Charmi Group Title
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    what abt 4 significant digits

    • 2 years ago
  5. Agentjamesbond007 Group Title
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    Then, you'll need to have 4 digits after the decimal place. The same would be applied, but if say you need to round the number 5, it would be 5.0000 Significant digits (significant figures) are usually used for noting accuracy.

    • 2 years ago
  6. Charmi Group Title
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    oh ok thanks

    • 2 years ago
  7. Agentjamesbond007 Group Title
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    You're Welcome!

    • 2 years ago
  8. Charmi Group Title
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    do you kno how to do scientific notations as well

    • 2 years ago
  9. Charmi Group Title
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    if you do, can you show me how please

    • 2 years ago
  10. nanaheads Group Title
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    I do

    • 2 years ago
  11. Charmi Group Title
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    how do you do it

    • 2 years ago
  12. Charmi Group Title
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    can you giv me an example

    • 2 years ago
  13. Agentjamesbond007 Group Title
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    Scientific notation is basically getting a very big (or small) number, starting from the end (if big) or beginning (if small [decimal]), and count the place values from the initial point to a decimal point after the number. example: 440000 4.4x10^5 Here, you need to put an imaginary decimal point at the end of the number and shift it until you get the number 4.4. Count the place values and that's your x10 exponent. works the same way in a very small number 0.00002 2.0x10^-5

    • 2 years ago
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