The population of a certain type of algae in a pond is increasing exponentially, as shown in the table below. At this rate, on which day would the population of algae reach $2.43\times 10^5$ cells?

Day	Population of algae (cells)
1	$1.0\times 10^3$
2	$3.0\times 10^3$
3	$9.0\times 10^3$