In Texas, the population of species of bats is decreasing adding rate of -0.0 21 per year. The pollution was 22,000 in 2010. According to the function, A(t)=Ao^e^(kt), what is the predicted population in 2015

Ithink the answer is b

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.

Kis the midpoint of bc