At a bookstore, Mrs. McIntyre buys three books, one for each of her children. Each book costs the same amount. She also buys a $1.50 magazine for herself. Her purchases have a
total price of $13.47. Write an equation that could help Mrs. McIntyre know the price of
one book. What is the price of one book?

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?