Answer:
To solve this problem, we can use trigonometry and the properties of right triangles. We know that Kareem is standing 100 feet from the base of the building, and he estimates the angle from his vantage point to the top of the building to be 75 degrees. Let's call the height of the building "h".
Using tangent, we can set up the following equation:
tan(75) = h/100
Solving for h, we get:
h = 100 * tan(75)
Using a calculator, we get:
h ≈ 466 feet
Therefore, the building is about 466 feet tall, rounded to the nearest foot.