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15 December, 11:04

1. a researcher tagged 40 giant turtles in 2008. In 2009, she returned and captured 50 turtles, 16 of which were tagged. In 2010 she returned again and captured 30 turtles, 8 of which were tagged.

A. Use a proportion to estimate the turtle population for 2009

B. Use a proportion to estimate the turtle population for 2010

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Answers (1)
  1. 15 December, 12:23
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    Given:

    2008 - 40 giant turtles tagged

    2009 - 50 turtles capture where 16 were tagged

    2010 - 30 turtles capture where 8 were tagged

    2009:

    40/x = 16/50

    40*50 = 16x

    2000 = 16x

    2000/16 = x

    125 = x

    2010:

    40/x = 8/30

    40*30 = 8x

    1200 = 8x

    1200/8 = x

    150 = x
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