Demographics—Population Growth: The population of Eastbrookfrom 2000 to 2010 canbe modeled by
f(x) = 80,300 + 800x 0 ≤ x ≤ 10
where x represents the number of years since 2000, and f(x) represents the population. The population of Westbrook during the same time period is given by
g(x) = 62,600 − 200x 0 ≤ x ≤ 10
(a) Evaluate ( f + g)(4) and interpret.
(b) Evaluate ( f − g)(8) and interpret.
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