Answer
$6$ miles
Work Step by Step
Given \begin{equation}
d=\sqrt{1.5 h}.
\end{equation} We are given that $h = 24$ feet and want to find the distance that a person can see to the horizon. Find $d(24)$. \begin{equation}
\begin{aligned}
d(24)& = \sqrt{1.5 \cdot 24} \\
&= 6.
\end{aligned}
\end{equation} The distance that a person can see to the horizon is $6$ miles.
