The weight of male babies less than two months old is the United States is normally distributed with mean 12.3 pounds and a standard deviation 3.8 pounds.

a. find the 84th percentile of baby weights
b. find the 11th percentile of baby weights
c. find the third quartile of baby weights

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

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?