How to find the volume of a composite figure

See attachment below and find the equivalent of tan(∠qsr)

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

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?