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Để sản xuất thùng chứa nhiên liệu thứ nhất cho tàu con thoi của NASA cần phải hao phí mất 400 giờ công lao động. Với mức tỷ lệ kinh nghiệm là 80%, Hệ số góc đường cong kinh nghiệm 0,381. Vậy thời gian để sản xuất thùng thứ 20 sẽ là:

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