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Mathematics, 21.06.2019 19:30
Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500
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Mathematics, 21.06.2019 22:00
1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25
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