a visitor is staying in a tent that is 15 kilometers east of the closest point on a shoreline to a coral reef. the coral reef is 5 kilometers due south of the shoreline. the visitor plans to travel from the tent to the coral reef by running and swimming. if the visitor runs at a rate of 9 kmph and swims at a rate of 5 kmph, how far should the visitor run to minimize the time it takes to reach the coral reef? round to two decimal places.
