Explanation
We are told that the maximum distance, d in kilometres that can be observed is given by
[tex]d=\frac{3}{2}h[/tex]If the height of the building is 290.7 meters, then
The value of d will be calculated as
[tex]\begin{gathered} d=\frac{3}{2}\times h=\frac{3}{2}\times290.7 \\ \\ d=436.05\text{ Km} \end{gathered}[/tex]Thus, the value of d will be 436.1 km