Ratios, Rated and Proportions 1 It says to Simplify each. Write your answer as a mix number when possible

My question are

15/20 15/18 32/40 24/30 18/72 3/6 9/12 9/18 6/42 and 108/252 (also I'm new to this app)

Find the solution on the interval [0, 2pi)

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?

Benefit(s) from large economies of scale, in which the costs of goods decrease as output increases. natural monopolles perfect competition