Math
posted by Diana on .
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.

help please !!!!!!!!!

We know that there are 40 turtles tagged.
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) 
thanks

need help plz

USE A PROPORTION (><)