**It is projected that, t, years from now, the population of a certain country will become million.** **a) At what rate will the population be changing with respect to time 10 years from now?**
...I thought taking the first derivative of the equation would give me the rate of change... and it did... but it's not the answer the question is looking for.

...and I solved for 10 years and compared the population to the present...

million

million

million

rate of change

rate of change

...and that's also not the right answer...

So... now I don't know what to do.