 Exponential Equations
Exp Type I: Base 10, use common logarithm.
Exp Type II: Base e, use natural logarithm.
Exp Type III: Base b, use change of base theorem.  Growth/Decay Formula
Exponential growth or decay can be described by the
equation
A = A_{0}e^{rt}
where r is the annual growth/decay rate, t is the time
(in years), A_{0} is the amount present initially
(present value), and A is the future value. If r is positive, this formula models growth, and if r is negative, the formula models decay.
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© 2011 Karl J. Smith. All rights reserved. 