The elevation at the summit of mount whitney is 4,418 feet above sea level. climbers begin at a trailhead that has an elevation of 2,550 feet above sea level. what is the change in elevation between the trailhead and the summit?

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.