Jessica earned $13.50 babysitting one night. after babysitting the next day, she had a total of $31.75. how much did she earn babysitting the next day? equation: 13.50 + x = 31.75 jessica earned $ babysitting the second day.

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?