What is the distance of -a and a?

What is the shape of the height and weight distribution

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?

Plz ( true - false) all triangles have interior angles whose measure sum to 90.