Factor the expression: 2x2 − 5x − 3 a. (2x − 3)(x + 1) b. (2x + 3)(x − 1) c. (2x − 1)(x + 3) d. (2x + 1)(x − 3)

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?