Could you an example of rational number × irrational number whose product is a rational number?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take

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

Ithink i know it but i want to be sure so can you me out ?