The freight elevator of a building can safely carry a load of at most 4000 lb. A worker needs to move supplies in 50-lb boxes from the loading dock to the fourth floor of the building. The worker weighs 160 lb. The cart he uses weighs 95 lb.
(A) Write and solve an inequality to determine the greatest number of boxes he can move in one trip.
(B) The worker must deliver 310 boxes to the fourth floor. How many trips must she make?



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