Plz the statement "cot theta= 12/15, sec theta= -13/5 and the terminal point determined by theta is in quadrant 4": a. cannot be true because sec(theta) is greater than zero in quadrant 4 b. cannot be true because if cot(theta)= -12/5, then sec(theta)= +/- 13/12. c. cannot be true because cot(theta) must be less than 1. d. cannot be true because 12^2+5^2 does not = 1.

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?