Consider U = {x|x is a negative real number}.
Which is an empty set?
0 {x|x e U and x has a negative cube root}
XX e U and x has a negative square root}
{x|x e U and x is equal to the product of a positive number and -1}
O {xx € U and x is equal to the sum of one negative and one positive number}

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?