Answer
$5.4$ feet
Work Step by Step
Plug the given time into the formula. Multiply the denominator on both sides, and then square both sides to get the vertical distance.
$t=\frac{\sqrt d}{2}$
$1.16=\frac{\sqrt d}{2}$
$1.16*2=\sqrt d$
$2.32=\sqrt d$
$d\approx5.4$