Milan bought 4 CDs that were each the same price. Including sales tax, he paid a total of $52.40. Of that total, $4.80 was tax. What was the price of each CD before tax?

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%