At 3:00 PM, Andy began walking directly south from point A at a rate of 4 mi/h. At the same time, Bill started walking directly west from point B to point A, at a rate of 5 mi/h. The distance between A and B is 9 miles. Assume that both of them stop walking when Bill reaches point A. At what time will be distance between Andy and Bill be minimized? Round your answer to the nearest minute. 5:00 PM 4:06 PM 5:30 PM O 3:45 PM
