Please helppp i would really appreciate it :(( Which of the following are not polynomials?

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2 acellus answer

50 points~ ! i have to turn this in tomarrow