Solve
-An Object Is Thrown Upward from the Top of a 160-Foot

Multiple Choice

Solve.
-An object is thrown upward from the top of a 160-foot building with an initial velocity of 48 feet per second. After $t$ seconds, the height $h ( t )$ of the object is given by the function $h ( t ) = - 16 t ^ { 2 } + 48 t + 160$ . Find how long it takes the object to hit the ground.

A) $5 \mathrm { sec }$
B) $10 \mathrm { sec }$
C) $160 \mathrm { sec }$
D) $2 \mathrm { sec }$