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March 3, 2015

March 3, 2015

Posted by **Dave** on Thursday, November 10, 2011 at 8:08pm.

- calculus -
**Steve**, Friday, November 11, 2011 at 12:00amJust plug the numbers into the good old eponential growth formula:

P(t) = Po * e^rt

P(0) = 8.4 so Po = 8.4

P(t) = 8.4 e^rt

P(3) = 9.3 = 8.4 e^3r

9.3/8.4 = e^3r

ln 1.107 = 3r

r = ln 1.107/3 = 0.0339

P(t) = 8.4 e^.0339t

P(8) = 8.4 e^0.271 = 11.0

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