Campsite a : 82.4
campsite b : 124.5
campsite c : -67.8 morgan is hiking to different points of interest at a national park. she compares the elevation changes recorded by her digital fitness tracker and the elevations stated by the park map. morgan hikes from trail top to a creek marked on the map. her fitness tracker tells her that the change in elevation is −67.2 feet. then she hikes to a swinging bridge. her tracker tells her that the change in elevation for this second hike is 8.4 feet. what was the change in elevation from the beginning of the hike to the end of the hike as recorded on her fitness tracker?
trail top : 381.1
overlook pass : 375.2
cave trail end : -55.3