19. [0/0.15 Points) DETAILS PREVIOUS ANSWERS Mobile Instant Messaging Accounts Mobile instant messaging (IM) is a small

[answerhappygod]

19 0 0 15 Points Details Previous Answers Mobile Instant Messaging Accounts Mobile Instant Messaging Im Is A Small 1 (25.85 KiB) Viewed 35 times

19. [0/0.15 Points) DETAILS PREVIOUS ANSWERS Mobile 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) = 0.2571²+ 0.571 +3.9 (0 st≤4) gives the project mobile IM accounts in year t as a percentage of total enterprise IM accounts from 2006 (0) through 2010 (-4). (a) What percentage of total enterprise IM accounts were the mobile accounts in 2009 X% (b) How fast was this percentage expected changing in 2009? x% per year Submit Answer MY NOTES