Jordan is a manager at a landscaping company. He has two workers to landscape an entire park, Cory and Lynn. Cory can complete the project in 9 hours. Lynn can complete the project in 6 hours. Jordan wants to know how long it will take them to complete the project together. Write an equation and solve for the time it takes Cory and Lynn to complete the project together. Explain each step

In a test for esp (extrasensory perception), a subject is told that cards only the experimenter can see contain either a star, a circle, a wave, or a square. as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. a subject who is just guessing has probability 0.25 of guessing correctly on each card. a. the count of correct guesses in 20 cards has a binomial distribution. what are n and p? b. what is the mean number of correct guesses in 20 cards for subjects who are just guessing? c. what is the probability of exactly 5 correct guesses in 20 cards if a subject is just guessing?