At midnight, a hospital emergency room (E.R.) has 3 patients. The rate that new patients are admitted to the E.R. over the next 24 hours is modeled by the function A (t) =(768 +23t-t). The rate that E.R. patients are released over the same time period is modeled by the function 65 R (t) = (390+41t t). The units for both A (t) and R (t) are in people per hour. Approximately how many patients are in the E.R. at the end of the 24-hour time period? OA. 3 O B. 5 O C. 7 O D. 9 OE. 11 A region is bounded by the curves y = x - 3, y = , and the x axis. Which of the following best represents the area of the region? OA. 2.0 O B. 2.5 O C. 3.0 D. 3.5 OE. 4.0