The diameter of a round patio is 16 feet. Which expression can be used to find the patio’s circumference in feet?

NEED HELP ASAP!

Which expression is equivalent to sq-80

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10

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?