Ashipment of marbles with a mean diameter of 27 mm and a standard deviation of 0.15 mm is normally distributed. by how many standard deviations does a marble with a diameter of 26.85 mm differ from the mean? 0 0.15 1 2

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?

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11

Which expression is rational? 6. , square root two, square root 14, square root 49