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✔) The tectonic plates of the ocean floor are constantly spreading. The Mid-Atlantic Ridge is
spreading slowly at about 5 x 10 kilometers per year. The East-Pacific Rise is spreading
faster at about 1.5 x 10 kilometers per year.
)) Use these numbers to complete the sentence below. Write your answer in standard form,
without using exponents.
The East-Pacific Rise is spreading about
times as fast as the Mid-Atlantic Ridge.
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