John drives at an average speed of 40 miles per hour for the first 5 hours of the 655 mile trip to buffalo. charlie then drives the remaining distance in 7 hours. what is charlie's average driving speed?

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?