During the tax season Mr. Wilson wants to rent an extra copy machine for his accounting business in Southaven. Company a rents machines for $220 and charges $.02 per copy, while Company B in Horn lake charges $150 for the machine but charges $0.03 per copy. At copies it will cost the same amount to rent from either Company A or B.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

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?