Use logarithmic differentiation to find dy/dx if y=(cosx)sinx. write the derivative in terms of x only. show all your work.
(cos ^sin()(cos(x)ln(cos((x)sin(x)) is what i got, although i am not entirely sure if this is correct.

The data represents the semester exam scores of 8 students in a math course. {51,91,46,30,36,50,73,80} what is the five-number summary?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

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?