Ascientist is studying the population growth rates of two different species of rats in the same laboratory conditions. the population of species a is represented by the equation below, where p represents the population at the end of x weeks. p=2^x+19 the population of species b is represented by the equation below, where p represents the population at the end of x weeks. p=3^x+18 which statement is true? a. at the end of 18 weeks, species a and species b will have the same population. b. at the end of 21 weeks, species a and species b will have the same population. c. at the end of 3 weeks, species a and species b will have the same population. d. at the end of 1 week, species a and species b will have the same population.