Algebra-2

Question Analysis
This problem assesses the application of the tangent function in a real-world context.

Key Concept Explanation
The tangent of an angle in a right triangle is the ratio of the length of the opposite side to the length of the adjacent side. Here, the opposite side is the height the ladder reaches on the wall, and the adjacent side is the distance from the base of the ladder to the wall.

Step-by-step Solution
1. Identify the lengths of the opposite and adjacent sides: Opposite = 20 feet, Adjacent = 15 feet.
2. Calculate the tangent:

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