Problem 1 The density p x in cars per mile was recorded in the table below at various points along an eight mile road between a major city and a traffic collision Approximate the total number of cars on the eight mile road using a midpoint approximation with n 4 I 0 1 2 3 4 5 6 7 8 p x 225 200 275 250 325 500 659 400 650 CITY collision