A countrys population in 1991 was 231 million. In 1999 it was 233 million. Estimate the population in 2003using exponential growth formula. Round your answer to the nearest million.
can somebody explain this to me please.

Question

A countrys population in 1991 was 231 million. In 1999 it was 233 million. Estimate the population in 2003using exponential growth formula. Round your answer to the nearest million.   
can somebody explain this to me please.

anonymous · Answer

The population growth exponentially.
P=Ae^(Bt)
A and B are constant, P=population, t=time

anonymous · Answer

see im taking plato and i havent even learn this so can you explain it in steps please?/;

anonymous · Answer

t=1991 -> P=231
231=Ae^(B*1991) .................(1)

t=1999 -> P=233
233=Ae^(B*1999)..................(2)
from 1&2, you cn find A and B.

anonymous · Answer

and when i find a and b what do i do?

anonymous · Answer

You can find P when t=2003 using the very first equation.

anonymous · Answer

im confused... sorry. /:

anonymous · Answer

What class are you in?

anonymous · Answer

credit recovery.

anonymous · Answer

Were you able to find A and B?

anonymous · Answer

no because i dont know how to do it. im new to it so it takes time... and i dont even know what im doing, so yeah..

anonymous · Answer

let's make it a bit easier

start time at 1991 
1991  t=0
pop. is in millions
$$231 =A*e ^{Bt}  $$
can you solve that if t=0?

anonymous · Answer

what is $$e ^{0}$$ ?

anonymous · Answer

okay explain what  is, because im using my phone..

anonymous · Answer

You may need to review a bit http://tutorial.math.lamar.edu/Classes/CalcI/ExpFunctions.aspx

anonymous · Answer

thank you.

anonymous · Answer

Read that a couple times.  Then see if you still need help with this problem.

anonymous · Answer

okay.

anonymous · Answer

would the answer be235 ?

anonymous · Answer

close

anonymous · Answer

darn, so i did it wrong

anonymous · Answer

did you find A and B?  show me those and I can check that work...

anonymous · Answer

my friend at school showed me a way but im not to sure but what i did was:
1991=231
1999=232
2003=235
i got that by adding 2

anonymous · Answer

screen shotted

anonymous · Answer

i cant my phone is broken. wah
i just subtracted 231&232..
then got 2 and then added to 232 and got 235.

anonymous · Answer

You can't learn algebra by not learning algebra.

anonymous · Answer

i know... its just hard because i have to learn it by a computer and none of my teachers wont help me...

anonymous · Answer

>all of your teachers will help you

anonymous · Answer

@Algebraic! agreed, all teacher will help, just ask nicely :)