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Instant messaging accounts mobile instant messaging im is a


Qusetion: INSTANT MESSAGING ACCOUNTS Mobile instant messaging (IM) is a small portion of total IM usage, but it is expected to grow sharply. The function

P(t) = -0.257t2 + 0.57t + 3.9         (0 ≤ t ≤ 4)

gives the projected mobile IM accounts as a percentage of total enterprise IM accounts from 2006 (t = 0) through 2010 (t = 4).

a. What percentage of total enterprise IM accounts are the mobile accounts expected to be in 2008?

b. How fast is this percentage expected to change in 2008?

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Mathematics: Instant messaging accounts mobile instant messaging im is a
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