Spending on fiber-optic links to homes

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Question: Spending on fiber-optic links u.s. Telephone company spending on fiber-optic links to homes and businesses from 2001 to 2006 is projected to be

S(t) = -2.315t3 + 34.325t2 + 1.32t + 23           (0 ≤ t ≤ 5)

Billion dollars in year t, where t is measured in years with t = 0 corresponding to 2001. Show that S'(t) > 0 for all t in the interval [0, 5]. What conclusion can you draw from this result?

Reference no: EM131561140

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