Chapter 12, Problem 47RE

(a)

To determine

To calculate: The time required to double the money at $4\%$ if the doubling function is $t\left(r\right)=\frac{\ln 2}{\ln \left(1+r\right)}$.

(b)

To determine

To calculate: The time required to double the money at $6\%$ if the doubling function is $t\left(r\right)=\frac{\ln 2}{\ln \left(1+r\right)}$.

(c)

To determine

To calculate: The time required to double the money at $10\%$ if the doubling function is $t\left(r\right)=\frac{\ln 2}{\ln \left(1+r\right)}$.

(d)

To determine

To calculate: The time required to double the money at $12\%$ if the doubling function is $t\left(r\right)=\frac{\ln 2}{\ln \left(1+r\right)}$.

(e)

To determine

The comparison between the answers in part (a) to part (d) and the provided numbers $\frac{72}{4},\frac{72}{6},\frac{72}{10},\frac{72}{12}$.