Which situation represents a proportional relationship? a) the number of pounds of sugar in s sacks with 25 pounds of sugar in each of the sacks. b) the weight in w weeks of a kitten that gains 2 ounces per week if its starting weight is 3.5 ounces. c) the cost of purchasing p pounds of rib eye steak for $12.95 per pound with a coupon for $5.00 off the total cost. d) the cost of purchasing c crates of strawberries for $25.00 per crate of strawberries with a delivery charge of $10.00.

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?