A Toy Rocket Is Shot Vertically Upward from the Ground $t$

Multiple Choice

A toy rocket is shot vertically upward from the ground. Its distance in feet from the ground in $t$ seconds is given by $s ( t ) = - 16 \left( t ^ { 2 } \right) + 175 t$ . At what time(s) will the ball be $162 \mathrm { ft }$ from the ground? Round your answer to the nearest tenth of a second.

A) 169.8 sec and 180.2 sec
B) 5.5 sec
C) 10.9 sec
D) 1.0 sec and 9.9 sec