Someone help me please with this algebra problem

Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in

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

Y+ 2/y is it a polynomial in one variable or not? and if so, why?