Uncategorized A balloon rises straight up from the corner of 69th and Normal, at 10 ft/sec. What is the rate of… July 10, 2020 Posted by admin 10 Jul A balloon rises straight up from the corner of 69th and Normal, at 10 ft/sec. What is the rate of change of the angle of elevation between the balloon and an observer 100 feet away from the corner when the balloon is 100 feet high?
