Solve
-A Object Is Thrown Upward with an Initial Velocity $t$

Solve.
-A object is thrown upward with an initial velocity of 21 feet per second from the top of a 572 -foot building. The height of the object above the ground at any time $t$ can be described by the polynomial function $P ( t ) = - 16 t ^ { 2 } + 21 t + 572$ . Find the height of the object at $t = 4$ seconds.

A) $400 \mathrm { ft }$
B) $592 \mathrm { ft }$
C) $572 \mathrm { ft }$
D) $337 \mathrm { ft }$