In R2, a vector a≠0 in the second quadrant makes an angle of 120∘ with the positive x-axis, and a vector b≠0 in the third quadrant makes an angle of 150∘ with the positive x-axis (in the sense that the smaller of the two angles between b and the positive x-axis is 150∘). Find the sum of the angle between a−2b and a and the angle between a−2b and −2b.

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

What is the slope of (0,32) and (100,212)

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?