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

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. The height $h$ of the object after $t$ seconds is given by the quadratic equation $h = - 16 t ^ { 2 } + 48 t + 160$ . When will the object hit the ground?

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