A ball is thrown downward from a window in a tall building. Its position at time t in seconds is $s = 16 t ^ { 2 } + 32 t$ where s is in feet. How long (to the nearest tenth) will it take the ball to fall 133 feet?
A) 1.9 sec
B) 4.4 sec
C) 2.9 sec
D) 2.1 sec

Question

Quizplus · Accepted Answer

To find the time it takes for the ball to fall 133 feet, set $s = 133$ and solve the equation $16t^2 + 32t = 133$. Solving this quadratic equation gives $t \approx 2.1$ seconds.

A Ball Is Thrown Downward from a Window in a Tall