How come Bill Gates, a computer billionaire, who got in trouble by trying to take over the world with an operating system, is trying to give everybody vaccinations. Oh, and a side note, he said that vaccinations could lead to a 10-15% decrease in total population. The guy that used to always talk about overpopulation. Apparently vaccines are supposed to help people, and this doesn't seem like helping. How is anyone okay with this?

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?