Scientists began studying the elk population in Yellowstone Park in 1990 when there were 500 elk. They determined that t years after the study began the population size,N(t), was increasing at a rate proportional to 700 - N(t). If the population was 600 in year 2000, estimate the size of the elk population in year 2010?
1. population size ≈ 570
2. population size ≈ 590
3. population size ≈ 650
4. population size ≈ 630
5. population size ≈ 610