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      <text>01 biology</text>
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      <text><![CDATA[<p>A cell population doubles every 30 periods.<br><br>Starting with 1,000 cells, how many will be there after 300 periods?<br><br></p>]]></text>
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      <text><![CDATA[<math xmlns="http://www.w3.org/1998/Math/MathML"><mn>1000</mn><mo>&#x000B7;</mo><msup><mn>2</mn><mfrac><mn>300</mn><mn>30</mn></mfrac></msup></math>]]></text>
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