A Ball Is Thrown Straight Down from the Top of a 300-Ft

A ball is thrown straight down from the top of a 300-ft building with an initial velocity of -12 ft per second.The position function is What is the velocity of
The ball after 4 seconds?

A) The velocity after 4 seconds is -76 ft per second.
B) The velocity after 4 seconds is -116 ft per second.
C) The velocity after 4 seconds is -140 ft per second.
D) The velocity after 4 seconds is -52 ft per second.
E) The velocity after 4 seconds is -280 ft per second.