Question 600885
t=1935-1980= -45

3350=2500e^(k*(-45))


e^(k*(-45))=3350/2500

ln(e^(k*(-45)))=ln(3350/2500)


k=ln(3350/2500)/(-45)=-0.0065

In 2000 t=20, so...

P=2500e^(-0.0065*20)= 2196


:)