Newport Township is building a new playground area for neighborhood kids. The playground will be a square with a perimeter of 56 + 8
3
x

An equivalent expression is 56 + 8 (
1
3
x ).

Which expression represents the length of one of the playground's sides?

224 + StartFraction 32 over 3 EndFraction x
14 + two-thirds x
14 + StartFraction 8 over 3 EndFraction x
4 (56 + StartFraction 8 over 3 EndFraction x)

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?