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from sea level, the biosphere goes up about 9 km and down about 19 km. what is the thickness of the biosphere in meters?

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asked by katie
  1. 1 km = 1,000 meters
    28 km = ?? meters

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  2. if I put a banna in the fridge will it turn black tommorow?

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    posted by Taylor
  3. Try it and find out.

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    👤 Ms. Sue
  4. An interesting thing to try is does putting other ripe fruit with the banana speed up the 'going black' process? Alternatively does putting a ripe banana with other fruit speed up their ripening?

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    posted by Dr Russ

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