What is 10 +10? For an algebra assignment I wanna see if this app really works

36 inches/second = yards/minute how many yards?

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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?