Chapter 3.1, Problem 53E

Scientific Research: 1983–2003 The number of research articles per year, in thousands, in the prominent journal Physical Review written by researchers in Europe during 1983–2003 can be modeled by

$A\left(t\right)=\frac{7.0}{1+5.4{\left(1.2\right)}^{-t}},$ where t is time in years ( $t=0$ represents1983).6 Numerically estimate $\underset{t\to +\infty }{\lim A}\left(t\right),$ andinterpret the answer.