Solve the Problem
-A Rock Is Propelled Upward from the Top

Multiple Choice

Solve the problem
-A rock is propelled upward from the top of a building 210 feet tall at an initial velocity of 176 feet per second. The function that describes the height of the rocket in terms of time $t$ is $s ( t ) = - 16 t ^ { 2 } + 176 t + 210$ . Determine the time at which the rock reaches its maximum height.

A) $4.4 \mathrm { sec }$
B) $5.5 \mathrm { sec }$
C) $11 \mathrm { sec }$
D) $8.8 \mathrm { sec }$