Question 874689
A) P(t) = P0*e^rt, where P(t) is population at time t, r is the rate, t is time in years
B)r= -0.0077, t = 10, e = 2.71828
P(10) = 571,000*e^(-0.0077)10
P(10) = 528,683
C)450000 = 571000*e^(-0.0077)t
450000/571000 = e^(-0.0077)t
0.7880 = e^(-0.0077)t
(-0.0077)t = ln (0.7880)
(-0.0077)t = −0.2383
t = 30.95 years
When there are 450 thousand people in this city, t≈ 30.95 years