Astore owner paid 15 dollars for a book. she marked up the price of the book by 40 percent to determine its selling price.
part a - what is the selling price of the book? part b - a customer buys a different book that has an original selling price of $38. the book is discounted by 25%. the customer must pay a 6% sales tax on the discounted price of the book. what is the total amount the customer pays for the discounted book?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?