John wants to build a rectangular garden with a fixed perimeter of 20 cm and an area of no more than 50 cm². Which of the following represents the inequality that models this situation?

a) x (20−x) ≥ 50

b) x (10−x) ≥ 50

c) x (20−x) ≤ 50

d) x (10−x) ≤ 50

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?