Question 25 4 pts A spectator watches a rowing race from the edge of a river bank. The lead boat is moving in a straight line that is 50 ft from the river bank. If the boat is moving at a constant speed of 20 ft/sec, how fast is the boat moving away from the spectator when it is 120 ft past her? O 20.99 ft/sec O 18.46 ft/sec O 17.41 ft/sec O 65.1 ft/sec