Please help ! 35 points

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*