How high above the northern horizon is the North Star? How high would it be if you were in Miami? How can this be used to find your position on Earth?

30 degrees, 42 meters,

Explanation:

The Polaris or the pole star is located at the height of about the 30° above the northern hemisphere and is found when we reach a point that is at the 90 degrees of the latitudes and thus it appears to be directly overhead and The City of the Miami s located in the unites states and is the southern state of the North America and has an elevation of bout 6 feet that are about 2 meters form the mean sea level. With the lowest elevation of 0 meters and the highest elevation of about the 42 meters. The city covers about 56 square miles of area. For a traveler to find out the position on the earth he needs to move in the direction of the north star and firm the respective compass will guide him in the navigation on the map. As the rising altitude and distance from the mean sea level will also help in the identification of his position.