The data set in CEOSAL2 contains information on chief executive officers for U. S. corporations. The variable salary is annual compensation, in thousands of dollars, and ceoten is prior number of years as company CEO. Find the average salary and the average tenure in the sample. How many CEOs are in their first year as CEO (that is, )? What is the longest tenure as a CEO? Estimate the simple regression model

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?