yaramsylao
yaramsylao yaramsylao
  • 24-10-2016
  • Mathematics
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12 min to drive 30 laps ; 48 min to drive 120 laps

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lovelylunaxo
lovelylunaxo lovelylunaxo
  • 24-10-2016
the ratios are 3:5 for the first one and 4:10 for the second

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1. Đường kính của một loại trục máy là một đại lượng ngẫu nhiên có phân phối chuẩn N (μ = 250mm, σ2 = 25mm2). Trục máy được gọi là hợp quy cách nếu đường kính t