Answer:
32.6ft
Step-by-step explanation:
θ = 25°
[tex]\theta=arccos(\frac{100}{\sqrt{h^2+28h+10196}})\\\\\\\\frac{100}{\sqrt{h^2+28h+10196}}=\cos{\theta}\\\\h^2+28h+10196=(\frac{100}{\cos{25}})^2 = 12174\\\\h^2+28h - 1978=0\\\\h = 32.6[/tex]
