A25 foot cable is stretched from the top of an antenna to an anchor point on the ground. how tall is the antenna if the anchor point is 12 feet from the base of the antenna (rounded to the nearest foot)? a) 20 ft b) 21 ft c) 22 ft d) 23 ft

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?