The amount of time the university professors devote to their jobs per week is normally distributed with a

mean of 52 hours and a standard deviation of 6 hours.

a. What is the probability that a professor works for

more than 60 hours per week?

b. Find the probability that the mean amount of

work per week for three randomly selected professors is more than 60 hours.

c. Find the probability that if three professors are

randomly selected all three work for more than

60 hours per week

Write each fraction as an equivalent fraction with a denominator of 120then write the original fractions in order from samllest to largest

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.

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.