Please help . I’ll mark you as brainliest if correct

For their homecoming parade, the students of U-Math have created a colorful banner, 51 meters in length, that is made of two pieces of parachute material. The short piece is 21 meters shorter than the longer piece. Find the length of each piece.

Length of long piece= 36 m

Length of the short piece= m

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?