A ladder 51 ft long leans against a vertical wall. If the lower licit end is being moved away from the wall at the rate of 6 fu/sec, tion how fast is the height of the top changing (this will be a negative rate) when the lower end is 24 feet from the wall? 51 ft ated 51 ft y 03 . X Revie The height of the top is changing at a rate of when the lower end is 24 feet from the wall. (Simplify your answer.) entiat