Answer
491.36 million dollars
Work Step by Step
The flow of rate of the investment stream can be expressed as: $R(t)=2.04t^3-17.43t^2+43.87t+20.07$ million dollars per year.
We have: $r=0.062$ and $T=8 \ years$
The future value is equal to: $\int_0^{8} 2.04t^3-17.43t^2+43.87t+20.07 e^{0.062(8-t)} \ dt =806.88$ million dollars
Therefore, the present value is equal to:$\dfrac{\ Future Value}{e^{rT}}=\dfrac{806.88}{e^{0.062\times 8}}=491.36$ million dollars