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Please show all work, step by step. Thank you so much! D! X ,' art] at How much work is done lifting a 12 Ll;

Please show all work, step by step. Thank you so much!

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D! X ,' art] at How much work is done lifting a 12 Ll; chair from the ground to the top of a building that is 30 feet high using a rope weighing 3 figsx'ft? {similar to #3742) b. How much work is done lifting the same chair from the ground to a point 5 feet above the ground {instead of the 30 feet as in part a)

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