Either the radius or diameter of a circle is given below. Find the area of the circle based on the information given. First, express the area in terms of pi. Then, round your answer to the
nearest tenth of a unit.
(a) r =4 in
(b) r = 24 in
(c) r = 9 m
(d) d = 22 yd
(e) d = 16 cm
(f) d=1 ft

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

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?

Benjamin is making bow ties. how many 1/2yards lomg bow ties can he make if he has 18 feet of fabric?