Scientists are monitoring the populations of two insect species in a remote location in alabama. they estimate that the current population of insect a is 2.5 million. but it’s declining at the rate of 4% per year because of habitat loss. the estimated population of insect b is 1.2 million, and it’s increasing at the rate of 200,000 per year. let x represent the population of each insect species in millions, and y represent the elapsed time in years. which equation can be used to determine how long it will take for the populations of the two species to be equal?