Suppose a countrys population in 1980 is 210 million. in 1990 it was 225 million using the a= 210 million if t=0 in 1980 find the value of t in 1990

P = 210*e^(0.0069t) for 2000 ===> t = 2000-1980=20 

P = 210*e^(0.0069*20) 

P=241.0749=241

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x