The lengths of pregnancies are normally distributed with a mean of 267 days and a standard deviation of 15 days. a. Find the probability of a pregnancy lasting 308 days or longer. b. If the length of...

The lengths of pregnancies are normally distributed with a mean of

days and a standard deviation of

days. a. Find the probability of a pregnancy lasting

days or longer. b. If the length of pregnancy is in the lowest

then the baby is premature. Find the length that separates premature babies from those who are not premature.

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a. The probability that a pregnancy will last

days or longer is

​(Round to four decimal places as​ needed.)

b. Babies who are born on or before

days are considered premature.

​(Round to the nearest integer as​ needed.)