A ladder leaning against a wall forms a 30-60-90 triangle wi...

Question Analysis
This problem tests the application of 30-60-90 triangle properties in a real-world context.

Key Concept Explanation
In a 30-60-90 triangle, the longer leg (height) is times the shorter leg (base).

Step-by-step Solution
1. The height (longer leg) is given as 15 feet.
2. The shorter leg (base) is the height divided by :