Help please i need quick

For which pair of functions is (gof)(a)=|a|-2?

Maria walks a round trip of 0.75 mile to school every day. how many miles will she walk in 4.5 days

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?