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by KathyInCtrlPA
Mon Mar 04, 2013 11:03 pm
Forum: Intermediate Algebra
Topic: Exponential decay/half-life
Replies: 2
Views: 3646

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 function. Is that right?...
by KathyInCtrlPA
Mon Mar 04, 2013 7:39 pm
Forum: Intermediate Algebra
Topic: Exponential decay/half-life
Replies: 2
Views: 3646

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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