MathDB

You shoot an arrow in the air. It falls to earth, you know not where. But you do know that the arrow’s height in feet after

{t}

seconds is

-16t^2 + 80t + 96.

After how many seconds does the arrow hit the ground? (the ground has height 0)

\mathrm a. ~ 2\qquad \mathrm b.~3\qquad \mathrm c. ~4 \qquad \mathrm d. ~5 \qquad \mathrm e. ~6

Problem Statement