If you had 75 bars of chocolate but you gave 60 away, what is the percentage of thw amount you gave away?

What is the base of 1/9 to the power of 2

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

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?