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5. [9 points] The length of a concrete pole used by a power distribution company has a mean of 15 meters and a standard deviation

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5. [9 points] The length of a concrete pole used by a power distribution company has a mean of 15 meters and a standard deviation of 0.1 meter. Assuming that the lengths are normally distributed, what percentage of the concrete poles are: a. longer than 15.1 meters? b. between 14.8 and 15.2 meters in length? c. shorter than 14.7 meters? 6. [12 points] The diameter of a certain bacteria in micrometer has a PDF of: 1 f(x) =(x'+1) for 0

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