mathxl.com/Student/PlayerHomework.aspx?homeworkld=613432605&questionid=7&flushed=false&cld=6755770&back=DoA 2021FA Elementary Statistical Methods (MATH-1342-21300) Homework: 7.2 Question 9, 7.2.41-T HW Score: 70.37 Part 1 of 4 Points: 0 of The lengths of a particular animal's pregnancies are approximately normally distributed, with mean u = 266 days and standard deviation o = 20 days. (a) What proportion of pregnancies lasts more than 291 days? (b) What proportion of pregnancies lasts between 261 and 281 days? (c) What is the probability that a randomly selected pregnancy lasts no more than 251 days? (d) A "very preterm" baby is one whose gestation period is less than 236 days. Are very preterm babies unusual? . . . . . (a) The proportion of pregnancies that last more than 291 days is. (Round to four decimal places as needed.)