The number of research articles in a prominent journal written by researchers during 1983-2003 can be approximated by 4.7t thousand articles per year (0sts 20). 0.2+ where t is time in years (t O represents 1983). (a) Find an (appraximate) expression for the total number of artides (in thousands) written since 1983 (t- 0). (Round your coefficients to two decimal places.) N(r) - (b) Roughly how many articles were written from 1983 to 20037 (Round your answer to the nearest whole number.) thousand articles

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