Which value of a in the exponential function below would cause the function to shrink?

f(x) = a(three-halves) Superscript x
Four-fifths
Five-fourths
Three-halves
Seven-fourths

Astudent simplified a rational expression as shown.

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

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?