Find the distance between 3,8 to -4,8

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Two angles are complementary. the large angle is 36 more than the smaller angle. what is the measure of the large angle?