Please view the image below to help solve thank youu determine whether the scenario involves independent or dependent events then find the probability

The random variable x represents the number of phone calls an author receives in a day, and it has a poisson distribution with a mean of 8.7 calls. what are the possible values of x

Identify the number 127 as a rational or irrational. explain

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how