a visitor is staying in an inn that is 15 kilometers west of the closest point on a shoreline to an island. the island is 2 kilometers due south of the shoreline. the visitor plans to travel from the inn to the island by running and swimming. if the visitor runs at a rate of 3 kmph and swims at a rate of 1 kmph, how far should the visitor run to minimize the time it takes to reach the island?
