Help, i’ve been stuck on this for ever

True or false: the graph of y=f(bx) is a horizontal compression of the graph y=f(x) if b< 1

At oaknoll school, 90 out of 270 students on computers. what percent of students at oak knoll school do not own computers? round the nearest tenth of a percent.

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?