Calculate the limit. help pls

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

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?

When i'm with my factor 5, my prodect is 20 .when i'm with my addend 6' my sum is 10.what number am i