Question

a city's population is growing continuously at 4% a year. Its current population is 100,000. to the nearest whole year, when will the population be at least 200,000

Answer 1

since we have a continuous growth you want to use:
\[A=A_oe^{rt}\]

Answer 2

how do i know which numbers go where

Answer 3

A_0 is the initial amount
r is the rate
t is time
A is what we get in the end

Answer 4

A is what we get after whatever t is

Answer 5

so what is A_0, the initial amount?