masondubois
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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

Respuesta :

athan243
P=Ae^kt 
 225 = 210 * e^(k*(1990-1980) 
225/210=e^10k 
ln(225/210)=10k 
k=ln(225/210)/10=0.0069

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

P = 210*e^(0.0069*20) 

P=241.0749=241


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