At one point in time a person observes from a point 300 meters away a hot air balloon climbing vertically in the air. The angle of elevation is 25 degrees from the person to the top of the balloon. Later, the person observes that the angle of elevation to the balloon is now 60 degrees. What is the change in altitude, to the nearest meter, for the balloon from the first and second observations?

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Q: A hot-air balloon is held at a constant altitude by two ropes that are anchored to the ground. One…

A: Let's see the diagram below to understand what's going on:

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