A farmer nas 400 feet or Fencing she would like to use to make a rectangular enclosure. She would like to maximize me area of the enclosure. The graph below shows the square Footage or the enclosure depending on the length of it.

How many feet long should the enclosure be in order to maximize the area?

Can someone me out here and the tell me the greatest common factor

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?

Which statement accurately explains whether a reflection over the y axis and a 270° counterclockwise rotation would map figure acb onto itself?