Sorry for all the question but i have to be somewhere in about 10 minutes and this is due tomorrow and most of this i don't understand so plz me answer the ones without work

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i

Compute the standard deviation of the following set of data to the nearest whole number. 10, 10, 15, 20, 25

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?