During strenuous work a human body generates about 2,400 btus of body heat per hour. if 6 football players are in a gym that is 12 ft × 18 ft × 10 ft lifting weights, how many btus per cubic foot do they produce in 2 hours? (to the nearest tenth)

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?