A group of mountain climbers begin an expedition with 270 pounds of food. They plan to eat a total of 15 pounds of food per day. Which linear equation in slope intercept form represents this scenario?

A. y = - 15 + 270
B. y = -270x + 15
C. y = 270x - 15
D. y = 15x + 270

I think it is D, but just in case.

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?