Marianne buys 16 bags of potting soil that comes in 5/8 pound bags. if her father calls and says he needs 13 pounds of potting soil, how many additional bags of potting soil should she buy?

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?