Which u s state has an address of 70 degrees north and 150 degrees west longitude?

How does central place theory explain patterns in the size and distribution of cities?

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 geologic process is related to caldera formation?