Luke wants to play the 4 number game with the numbers 1, 2, 3, and 4 and the operations of addition, multiplication, and subtraction. leoni responds, "or we just could play the 4 number game with just the operation of addition and multiplication, but now with the numbers -1, -2, -3, -4, 1, 2, 3, 4 instead what observation is leoni trying to point out to luke?

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?