Question

A hiker starts hiking at the beginning of a trail at a point which is 200 feet below sea level. He hikes to a location on the trail that is 580 feet above sea level and stops for lunch. What is the vertical distance between 200 feet below sea level and 580 feet above sea level

Answer 1

780 feet because 200 feet below sea level means -200 and 580 feet above sea level mean +580 so if you add 580 and the 200 you get the distance between the two points.