A ball is thrown straight downward from the top of a buildin…

A bаll is thrоwn strаight dоwnwаrd frоm the top of a building with an initial speed of 4.200 m/s. It reaches the ground 3.10 s later. What is the height of the building in meters? Report your answer using the appropriate number of significant figures. Put only the numeric response — NO UNITS. _______