It is mentioned that the rate is constant at $85 per hour. Since, on Wednesday, Nita worked for 8 hours, she would earn 85*8 = $680. In addition to this, she also received a tip of $12. Thus, she earned a total of $680 + $12 = $692.
Hey I’m not sure what the question is but I answered another question with the same points and same answers so I think this has to do with Pythagorean theorem. And the answer is c. 13.6! Hope this helped