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D Question 13 3 pts A 30-foot ladder is leaning against a house (see figure). If the base of the ladder is pulled away from the house at a rate of 2 feet per second, the top will 2 x move down the wall at a rate of = 900 - x2 fu/sec, where x is the distance between the base of the ladder and the house. Find the rate r when x is 18 feet. bA Bec Or = - 48 5 ft/sec Or = 3 fu/sec Or = 2 A /sec Or=3fu/sec Or = = fu/sec