The time needed to complete a final examination in a particular college course is normally distributed with a mean of 79 minutes and a standard deviation of 8 minutes. answer the following questions.
what is the probability of completing the exam in one hour or less (to 4 decimals)?
what is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes (to 4 decimals)?
assume that the class has 60 students and that the examination period is 90 minutes in length. how many students do you expect will be unable to complete the exam in the allotted time (to the nearest whole number)?

Asap! i'm not good math and i'm lost.

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.

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?