A ladder 15 feet long is leaning against the wall of a house (see the figure below). The base of the ladder is pulled away from the wall at a rate of 2 feet per second. How fas top of the ladder moving down the wall when its base is 7 feet from the wall? Round your answer to three decimal places. Answer: Question 8 bft ft/sec Suppose that an automobile's velocity starting from rest is v(t)= 280t 4 1 where y is measured in feet per second. Find the acceleration at 5 seconds. Round your answer to one

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A: Speed of Hua = 11m/sspeed of the ball = 5m/s

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