Aworker can assemble 3 shelf units each hour. during the fifth hour of the shift, there were 115 shelf units in the warehouse. how many units were assembled before the shift started?

A worker can assemble 3 shelf units each hr. During the 5th hr...so the shift has been going on for 5 hrs...at 3 units per hr = (3 * 5) = 15 units assembled during the shiftand if there was 115 units in the warehouse, then that means before the shift, there were (115 - 15) = 100 units assembled <=

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