The total number of asteroids larger than 1 kilometer in diameter that cross Earth's orbit (Aten and Apollo asteroids) is currently estimated to be about 3,500 . Five times as many asteroids that cross Earth's orbit have diameters larger than 500 meters. Assuming this progression of number versus size remains constant for still smaller asteroids, how many would have diameters larger than 125 meters? (Note that the impact on Earth of any asteroid larger than 100 meters in diameter could cause maj
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