The lengths of pregnancies are normally distributed with a mean of days and a standard deviation of days. a. In a letter to an advice column, a wife claimed to have given birth days after a brief visit from her husband, who was working in another country. Find the probability of a pregnancy lasting days or longer. What does the result suggest?
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 considered premature.

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.