Solve the Problem
-An Object Is Propelled Vertically Upward from the Top

Solve the problem
-An object is propelled vertically upward from the top of a 32 -foot building. The quadratic function $s ( t ) = - 16 t ^ { 2 } + 160 t + 32$ models the ball's height above the ground, $s ( t )$ , in feet, $t$ seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.

A) 2 seconds
B) $10.2$ seconds
C) 5 seconds
D) $0.2$ seconds