Factor the polynomial. 7x2 + 68xy - 20y2 a) (7x - 2y)(x + 10y) b) (7x - 10y)(x - 2y) c) (7x + 10y)(x + 2y) d) (7x + 2y)(x - 10y)

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?