Mathematics, 03.04.2020 00:04, lovebunfan

The Grand Canyon is approximately 2 to the 9 power kilometers long. Mariner Valley is a canyon on Mars that is approximately 2 to the 12 power kilometers long. About how many times longer is Mariner Valley than the Grand Canyon?

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The Grand Canyon is approximately 2 to the 9 power kilometers long. Mariner Valley is a canyon on Ma...