Which polynomial correctly combines the like terms and expresses the given polynomial in standard form? 9xy3 â€"" 4y4 â€"" 10x2y2 x3y 3x4 2x2y2 â€"" 9y4 â€""13y4 3x4 â€"" 8x2y2 x3y 9xy3 â€""13y4 x3y â€"" 8x2y2 9xy3 3x4 3x4 â€"" 8x2y2 x3y 9xy3 â€"" 13y4 3x4 x3y â€"" 8x2y2 9xy3 â€"" 13y4.

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?