Mathematics, 11.01.2021 22:20 angie07253

The average time before breakdown of a machine is normally distributed and has a mean of 18 weeks and a standard deviation of three weeks. If breakdown cost averages $2,000 and preventive maintenance costs $1,400, what is the optimal preventive maintenance interval

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The average time before breakdown of a machine is normally distributed and has a mean of 18 weeks an...