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anonymous

  • one year ago

A certain radioactive isotope has a half-life of 5 days. If one is to make a table showing the half-life decay of a sample of this isotope from 32 grams to 1 gram; list the time (in days, starting with t = 0) in the first column and the mass remaining (in grams) in the second column, which type of sequence is used in the first column and which type of sequence is used in the second column?

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  1. tkhunny
    • one year ago
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    Well, do it. Let's see the table.

  2. anonymous
    • one year ago
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    There is no table, this is a geometric sequence question

  3. tkhunny
    • one year ago
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    You are to create the table. Up in the problem statement... "if one is to make a table" Yes, the second column should be a geometric sequence. That's part of the answer. You don't HAVE to create the table, but it may help answer the question.

  4. anonymous
    • one year ago
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    Oh yeah sorry haha so it would be: 0,1,2,3,4 32,....,1 and then I dont know the rest of the mass amounts

  5. tkhunny
    • one year ago
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    Nice try, but you're working too hard. Pick easy values. I'll give you one for free, just to help you broaden your thinking. |dw:1439774261775:dw|

  6. anonymous
    • one year ago
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    Ohh I thought I had to start from 0 to 4 for 5 days but okay

  7. tkhunny
    • one year ago
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    See, we changed your thinking a little. Mission accomplished! :-)

  8. tkhunny
    • one year ago
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    What kind of sequence is in the first column?

  9. anonymous
    • one year ago
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    arithmetic? cause you add 5

  10. anonymous
    • one year ago
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    and the second column is geometric

  11. tkhunny
    • one year ago
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    Done! Good work.

  12. anonymous
    • one year ago
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    Oh wow i guess i overcomplicate things too much

  13. tkhunny
    • one year ago
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    Nope. It was a thinking shift. ALWAYS look for different ways to think about it. Over-complicate? Over-simplify? Bah!! No need to assign value judgments to different thinking.

  14. anonymous
    • one year ago
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    hahah true!!

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