Hey! i need some serious with

as the number of pages in a photo book increases, the price of the book also increases. there is an additional shipping charge of 15%. the price of a book can be modeled by the equation below, where p = the price of the book, 20 is the printing charge, 0.5 is the charge per page, and x = the number of pages:

p = (20 + 0.5x) + 0.15(20 + 0.5x)

jennifer wants to purchase a book but only has $62.10 to spend. what is the maximum number of pages she can have in her book?

x = pages

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

What is the interquartile range of this data set? 2, 5, 9, 11, 18, 30, 42, 48, 55, 73, 81

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?