9) In the accompanying diagram, AB and CD intersect at E. Find the value of x. If m ZAEC = 4x - 40 and mZBED = x + 50, find the number of degrees in Z AEC?
B
E
(4x – 40)
(x + 50)
D
А
x=
MZAEC =

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?