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The jumping squirrel. A squirrel wants to jump from a point A on a branch of a tree to a point B on another branch. The horizontal distance from A to B is x = 5 ft, and the vertical distance is y = 4 ft. If the squirrel jumps with an initial speed of 20 ft/s, at what angle to the horizontal should he jump? (He has two choices. Put the larger angle first.)

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