1. helicopter J starts at a elevation of 1400 feet and descends at 8 feet per second at the same time a second helicopter K flying at 1500 ft starts to descend at 10 ft per a second a.) write an equation to model the elevation of each helicopter b.) what are the helicopters elevations after 20 seconds?after 60 seconds c.) when does one helicopter pass the other what is the elevation when that happens