Posted by **Jim** on Wednesday, July 18, 2012 at 5:49pm.

After its fastest rate of growth ever during the 1980s and 1990s, the rate of growth of world population is expected to slow dramatically in the twenty-first century. The function

G(t) = 1.58e−0.213t

gives the projected annual average percent population growth per decade in the tth decade, with t = 1 corresponding to 2000.†

(a) What will the projected annual average population growth rate be in 2020 (t = 3)? (Round your answer to two decimal places.)

% per decade

(b) How fast will the projected annual average population growth rate be changing in 2020 (t = 3)? (Round your answer to two decimal places.)

% per decade per decade

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