hello help me with this question thanks in advance

D. 40 ft.
Based on the given conditions, formulate:
[tex]30\times20\div15[/tex]
Calculate
[tex]\frac{30\times20}{15}[/tex]
Cross out the common factor
[tex]2\times20[/tex]
Calculate the product or quotient
[tex]40[/tex]
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C. Yes, Right Triangle Similarity Theorem
[tex]-\ If\ an\ altitude\ is\ drawn\ to\ the\ hypotenuse\ of\ a\\ right\ triangle,\ then\ the\ two\ triangles\ formed\ are\\ similar\ to\ the\ original\ triangle\ and\ to\ each\ other.[/tex]
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D. 23.40 ft.
[tex]height\ of\ tree:x[/tex]
[tex]\frac{x}{s_0-d_0}=\frac{39}{50}[/tex]
[tex]x=\frac{30.39}{50}[/tex]
[tex]=23.40ft[/tex]
[tex]\left \{ {{calculate\}[/tex]
I hope this helps you
:)