Viewing Saved Work Revert to Last Response [0/0.15 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER 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) = 0.257t2 + 0.57t + 3.9 (0 s ts 4) gives the project mobile IM accounts in year t as a percentage of total enterprise IM accounts from 2006 (t = 0) through 2010 (t = 4).+ (a) What percentage of total enterprise IM accounts were the mobile accounts in 2009? 2.11 X % (b) How fast was this percentage expected changing in 2009? 2 X % per year