Find the area and the circumference of a circle with radius 9 cm. Write your answers in terms of it, and be sure to include the correct units in your answers.
(a) Area: 0
DO
9 cm
cm
(b) Circumference: 0
Х

The perimeter of a rhombus with a side of 6 is 24

Extra points! find the missing dimension! need asap

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?