During 2009, Facebook surpassed Yahoo for the greatest number of unique monthly users. The formula F(x) =

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During 2009, Facebook surpassed Yahoo for the greatest number of unique monthly users. The formula F(x) = 0.0484x3 - 1.504x2 + 17.7x + 53 models these numbers in millions of unique monthly users x months after December 2008. 

(a) Evaluate F(1) and F(12). Interpret the result. 

(b) Graph y = F(x) in [0, 13, 2] by [0, 150, 25]. Does F have any local extrema for 1 ≤ x ≤ 12? 

(c) Where is F increasing if its domain is 1 ≤ x ≤ 12?

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