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anonymous

  • 5 years ago

Suppose the amount of a radioactive element remaining in a sample of 100 milligrams after X years can be described by A(x) = 100e^-0.018x. How much is remaining after 294 years? Round the answer to the nearest hundredth of a milligram.

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  1. anonymous
    • 5 years ago
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    Just plug x=294 into your equation.

  2. anonymous
    • 5 years ago
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    what is the e?

  3. anonymous
    • 5 years ago
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    http://en.wikipedia.org/wiki/E_%28mathematical_constant%29

  4. anonymous
    • 5 years ago
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    after finding x i get 100e^-5.292

  5. anonymous
    • 5 years ago
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    Finding x? x=294

  6. anonymous
    • 5 years ago
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    i multiplied 294 or x by -0.018x and got -5.292. i now have 100e^-5.292. now what

  7. anonymous
    • 5 years ago
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    Put that into a calculator.

  8. anonymous
    • 5 years ago
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    ok. i got .5 (rounder). correct?

  9. anonymous
    • 5 years ago
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    Yep.

  10. anonymous
    • 5 years ago
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    okidoki. thanks. medal

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