anonymous
  • anonymous
Need Help!!!..
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
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OakTree
  • OakTree
Okay. So we're obviously going to want to use the equation\[N_f = N_ie^{kt}\]Can you start filling in any of the terms of the equation?
anonymous
  • anonymous
Sorry i dont even know this...can you help me fill it out?

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OakTree
  • OakTree
Sure. So \[N_i\]Is your sample size at the beginning, e is the number 2.71, t is the time, and k is the decay constant, which is found with this equation:\[k = \frac{ -\ln2 }{ half-life }\]So now can you start filling anything in? I'm not just going to give you the answer, but I'll help you along.
anonymous
  • anonymous
so the bottom would be 138?
OakTree
  • OakTree
Of the fraction for k? Yes. So now evaluate.
OakTree
  • OakTree
Do you know how to evaluate that fraction with a calculator?
anonymous
  • anonymous
Im a little confused, where did you get 2.71?
OakTree
  • OakTree
Do you know the number e?
OakTree
  • OakTree
Okay then...I'll assume the teacher wants you to do this the simpler way that isn't as exact. So let's start over from the beginning. Sound good?
OakTree
  • OakTree
@kevincourtes?
OakTree
  • OakTree
..?
anonymous
  • anonymous
Sorry, i want able to respond.

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