The area of a rectangle is square inches. The width is inches. Part A: Which of the following expressions represents the length in inches?
A. 9r-7
B. 6r-5
C. 6r+5
D. 9r+7
Part B: If the area is 1,180 square inches, find the correct values for r, width and length from the list in your right.
r = ?
The rectangle measures ? by ?

List:
0
7/3
5
9
18
20
36
45
54
59

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?