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With interest at r percent compounded continuously, the doubling time in years is what?
A(100/r) ln 2
B(r/100) ln 2
C100 ln 2 / r^2
D(100/r) ln 4
Answer & Solution
Correct answer: A. (100/r) ln 2
P0 e^(rt/100) = 2P0 gives rt/100 = ln 2, so t = (100/r) ln 2.
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