Sammy had to hire an electrician to do some work in his house. He only has $500 to pay the electrician. There will be a $200 charge for the supplies and the electrician charges d dollars per hour. It will take him 5 hours to complete the work. How much could the electrician charge, d, per hour so that Sammy can afford the work? A. 200 + 5d < 500 B. 200-5d 500 D. 200 - 5d > 500​

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?