Apet sitter wants to advertise in several local newspapers. if the newspaper charges $20 per advertisement, how much will the pet sitter have to spend if she wants to place at least four ads?
a. write an inequality to represent the situation using x to represent the total amount of money that the pet sitter spends on ads
b. solve the inequality by isolating the variable. show all work leading to answer.
c. graph the solution on a number line
d. write a sentence to explain what the solution to the inequality represents

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?