Use the position function s(t) = –16t2 + 900, which gives the height (in feet) of an object that has fallen for t seconds from a height of 900 feet. The velocity at time t = a seconds is given by the following.

If a construction worker drops a wrench from a height of 900 feet, how fast will the wrench be falling after 2 seconds?

If a construction worker drops a wrench from a height of 900 feet, how fast will the wrench be falling after 2 seconds?