math

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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  1. 16/50 = 40/x
    16x = 2000
    x = 125

    Do the same for 2010.

  2. thank you but I don't get it

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  3. In 2009, 16/50 = 32% of the population was tagged, making the population 40/.32 = 125 (P/40 = 50/16)

    In 2010, 8/30 = 26.7% of the population was tagged. So, the population is about 150 (P/40 = 30/8)

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