1. The number of inmates N (measured in thousands) in federal and state prisons can be approximated by the equation Upper N equals negative 2.08 x squared plus 77.88 x plus 745,where x is the number of years since 1990. In what year was the number of inmates expected to be 1 comma 234 comma 920?
2. Bob drove from home to work at 30 mph. After work the traffic was heavier, and he drove home at 25 mph. His driving time to and from work was 1 hour and 6 minutes. How far does he live from his job?
Sales of SUVs (sport utility vehicles) in the United States (in millions) for the years 1990-1999 can be modeled by the quadratic function shown below. f(x)=0.016x^2 +0.124x+0.787 .Here x=0 represents 1990, x=1 represents 1991, and so on. Use the model to approximate sales in 1993.