The number of research articles in a prominent journal written by researchers can be approximated by U(t)=(4.7e^(0.6t))/(0.4+e^(0.6t)) thousand articles per year ,(t=0) where t is time in years ( t=0 represents 1983). (a) Find an (approximate) expression for the total number of articles (in thousands) written since ). HINT [See Example 7.] (

Question

The number of research articles in a prominent journal written by researchers can be approximated by

U(t)=(4.7e^(0.6t))/(0.4+e^(0.6t)) thousand articles per year ,(t>=0)

where

t

is time in years (

t=0

represents 1983). (a) Find an (approximate) expression for the total number of articles (in thousands) written since ). HINT [See Example 7.] (Round your coefficients to two decimal places.)

N(t)=

(b) Roughly how many articles were written from 1983 to 2003? (Round your answer to the nearest whole number.) thousand articles Need Help?ask a expert

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