The distance you can see to the horizon is given by the formula d=√1.5h, where d is the distance in miles and h is the height in feet above horizon line.
Mt. Whitney is the highest point in the 48 states. Its elevation is 14,494 feet. The lowest elevation, at -282 feet, is located near [...]

228 people have registered for a sightseeing tour of the Grand Canyon . If a tour director can take 35 people on each tour, how many tour directors will be needed to accomodate everyone?By: Chika SAbout the Author: