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The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of 269 days and

The pregnancy length in days for a population of new mothers can be approximated by a normal distribution with a mean of

269

days and a standard deviation of

10

days.(a) What is the minimum pregnancy length that can be in the top

9%

of pregnancy lengths?(b) What is the maximum pregnancy length that can be in the bottom

4%

of pregnancy lengths?

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