Tourism is the industry in the world

This is a 2017 topographic map of puerto rico in the united states, and i'm sorry that people there have suffered such a disaster. i want to ask, what do the yellow dots and areas represent on this graph? and the blue area and the little blue circle, and the little blue sign that looks like a signal tower, what do they stand for?

What do we think became of the big bang?

Write the formula for the area of a triangle, a, where b is the base and h is the height of the triangle. don’t include parentheses in your answer.