Chapter 14.1, Problem 36E

To determine

To calculate: The multiplier and determine which account grows faster when money is invested for $40\text{years}$ at $6\%$ with marginal income tax rate of $28\%$, using multiplier function $M\left(n,i,t\right)=\frac{{\left(1+r\right)}^n\left(1-t\right)+t}{{\left[1+\left(1-t\right)i\right]}^n}$.