The population of a city at time t years after 2002 is expressed as

P(t)=12300(e^0.009t).

a) Estimate the population of the city in 2012.

For this one I made t=10 because 2012-2002=10

the answer was aprox. 13458.3469

b) Estimate the year the population will be doubled its population in 2002

I tried to find the initial population by making t=0... also tried t=1 d n both cases the answer was bigger than the answer for a).

What am I doing wrong?