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by KathyInCtrlPA
Mon Mar 04, 2013 11:03 pm
Forum: Intermediate Algebra
Topic: Exponential decay/half-life
Replies: 2
Views: 2626

Re: Exponential decay/half-life

Ok, I think I understand now that there's an "r" in both the equations... y=a(1+r)^t and y=ae^(rt) and the "r" in each equation represents the growth/decay rate, but the first one is annual (or other fixed period) and the other is continuous, and they're not exactly the same func...
by KathyInCtrlPA
Mon Mar 04, 2013 7:39 pm
Forum: Intermediate Algebra
Topic: Exponential decay/half-life
Replies: 2
Views: 2626

Exponential decay/half-life

Hi, I have a general question about whether you can usually use either formula, A(t) = Ae^(kt), or A(t) = Ab^t, in exponential decay (half-life) word problems, or if there is some difference in where each of these formulas is applicable. I'm used to using A(t) = Ae^(kt) for everything, but I saw som...

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