### Formula

r

periodic interest rate,periodic rate of return,constant growth rate

Td

doubling time

r

periodic interest rate,periodic rate of return,constant growth rate

Td

doubling time

The doubling time is the period of time required for a quantity to double in size or value. This formula can be used in finance to calculate the periodic interest rate or periodic rate of return given the length of time required to double an investment or money in an interest bearing account.

Td

r

Precision

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