The population of turtles is doubling every 3 months. If there are 400 turtles now, how many will there
be in 2 years?

First we need to know how many months is 2 years. To answer that we multiply the number of months in a year by 2 and get 48 months.

Every 3 months the population of turtles doubles, but to get how many times the population doubles, you need to divide 48 months by 3 to get 16.

So population of 400 will get doubled 16 times in the following two years.

We construct the following equation where is the final population,

Hope this helps. :)

i think ur answer is   (3,-1)