What is the property of 16-3 and 3-16

Determine the relationship of ab and cd given the following points

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

The chs baseball team was on the field and the batter popped the ball up. the equation b(t)=80t-16•16+3.5 represents the height of the ball above the ground in feet as a function of time in seconds. how long will the catcher have to get in position to catch the ball before it hits the ground? round to the nearest second