The numbers of students S (in millions) enrolled in private colleges in the United States from 2000 through 2007 can be modeled by the equation S=\sqrt(0.029t^(2)+1.27t+12.5),0<=t<=7 where t is the year, with t=0 corresponding to 2000 . (Source: U.S. National Center for Educational Statistics) Use the table feature of the ti-83 to find the number of students enrolled for each year from 2000 to 2007. Use the ti-83 to graph the model in an appropriate viewing window. Use the zoom and trace features of the graphing utility to find when enrollment reached 4.5 million.