Arappelling club charters a bus for a trip to the mountains for $540. to lower the bus fare per person, the club invites some hikers on the trip. after 7 hikers join the trip, the bus fare per person decreases by $7. how many members of the rappelling club are going on the trip?

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

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?

Factor the polynomial expression x6 – x3 – 20