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Solve for t using natural logarithms. B=Pe^9rt

User Jpn
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B= P.e^(9rt)
ln(B) =ln(P.e^(9rt)
ln(B) = ln(P)+lne^(9rt)
lnB() = ln(P) + 9rt.lne
ln(B) = lnP() + 9rt
ln(B) - ln(P) = 9rt and t = [ln(B)-ln(P)]/9r or t= [ln(B/P)]/9r (both are correct)
User SunriseM
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