High School

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Describe all the points on the Earth's surface that are exactly 4000 miles from the North Pole. Remember that the radius of the Earth is 3960 miles.

A. A point on the equator
B. A point on the Arctic Circle
C. A point on the Antarctic Circle
D. A circle centered at the North Pole with a radius of 4000 miles

Answer :

Final answer:

Points on Earth's surface 4000 miles from the North Pole form a circular region, not aligning with standard latitudinal markers. A circle with such a radius would be slightly above Earth's surface along a circle of latitude around the Arctic Circle.

Explanation:

The points on the Earth's surface that are exactly 4000 miles from the North Pole describe a circle of latitude, not any of the specific options (a, b, c) given in the question.

Since the Earth's radius is approximately 3960 miles, a point that is 4000 miles from the North Pole would have to be roughly 40 miles from the Earth's surface somewhere along the Arctic Circle, which is at 66.5 degrees North. Remembering that each degree of latitude is about 69 miles, the Arctic Circle is over 1600 miles from the North Pole, and the equator is about 3960 miles from it. Therefore, the correct answer is d) A circle centered at the North Pole with a radius of 4000 miles.

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