Chapter 1.4, Problem 20E

BROADBAND VERSUS DIAL-UP The number of U.S. broad-band Internet households (in millions) between the beginning of $2004\left(t=0\right)$ and the beginning of $2008\left(t=4\right)$ is approximated by

$f\left(t\right)=6.5t+33\left(0\le t\le 4\right)$

Over the same period, the number of U.S. dial-up Internet households (in millions) is approximated by

$g\left(t\right)=-3.9t+42.5\left(0\le t\le 4\right)$

a. Sketch the graphs of $f$ and $g$ on the same set of axes.

b. Solve the equation $f\left(t\right)=g\left(t\right)$, and interpret your result.