3 Matt purchased a 60-foot-long roll of chain-link fence.
He used the entire roll of fence to construct a
rectangular pen for his dog. Given that the pen is
12 feet wide, what is its length, in feet?
A. 5
B. 18
C. 24
D. 36
E. 48

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?