GREAT PRIZES ANSWER NOW!! 1.) a railroad construction crew can lay 1 1/4 mi of track in one day. at that rate, how many miles of track can be laid in 10 days?
2.) a railroad construction crew can lay 1 1/4 mi of track in one day. at that rate, how many days will it take to lay 10 miles

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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?