Chapter 10, Problem 67RE

(a)

To determine

The value of $N$ by the use of year $1870,1920\text{ and 1970}$, the value of $b$ by the use of year $1870$ and the value of $k$ by the use of year $1920$ in the equation $y=\frac{N}{1+b{e}^{-kt}}$.

(b)

To determine

The population of the United states in 2010 and compare with actual population in $2010$.

(c)

To determine

The predicted populations of United states in $2030$ and $2050$.