The lengths of a particular animal's pregnancies are approximately normally distributed, with mean μµ = 255 days and sta

[answerhappygod]

The lengths of a particular animal's pregnancies areapproximately normally distributed, with mean μµ = 255 days andstandard deviation σ = 12 days. (a) What proportion of pregnancieslasts more than 276 days? (b) What proportion of pregnancies lastsbetween 246 and 261 days? (c) What is the probability that arandomly selected pregnancy lasts no more than 231 days? (d) A"very preterm" baby is one whose gestation period is less than 237days. Are very preterm babies unusual? Click the icon to view atable of areas under the normal curve. (a) The proportion ofpregnancies that last more than 276 days is (Round to four decimalplaces as needed.)