A building 180 feet tall casts a 30 foot long shadow. If a person looks down from the top of the building, what is the measure of the angle between the end of the shadow and the
vertical side of the building (to the nearest degree)? (Assume the person's eyes are level
with the top of the building.)

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?