Question 63506
This seems to just be a substitute 2025 for y in the equation type problem.
{{{P(millions)=250*2^((y-1990)/66)}}} 
{{{P(millions)=250*2^((2025-1990)/66)}}} 
{{{P(millions)=250*2^(35/66)}}} 
{{{P(millions)=250*1.44}}} 
= 361
So the expected population will be 361 million people