I need help with the question below

4. find the geometric mean of 4 and 12. 24 8

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000