Pair of listening post is 4000 feet apart they both pick up a soundboard one listening post records the sound 1.5 seconds after the other listing post assume sound travels app 1100 ft per second which equation can be used to determine the possible location to the origin of the sound x2/825 - y2/1,175 = 1
x2/680,625 - y2/3,319,375 = 1
x2/680,625- y2/4,000,000 = 1
x2/ 2,722,500-y2/13,277,500 = 1​