a motorboat, moving at a speed of 10 km/hour, left a pier traveling against the current of the river. forty-five minutes after the boat left the pier, the motor of the boat broke, and the boat began drifting with the current. after three hours of drifting with the current, the boat was back at the pier where it had started. what is the speed of the current of the river?

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet