A welder produces 7 welded assemblies during the first day on a new job, and the seventh assembly takes 45 min (unit time). The
worker produces 10 welded assemblies on the second day, and the 10th assembly on the second day takes 30 min. Given this information, (a) what is the learning rate percentage and (b) what is the total cumulative time to produce all 17 welded assemblies
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