How many sixths are there in 5/12

If you answer right ill give brainliest, : )

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?