Music Sales The table lists the percentage of recorded music purchased through digital downloads during selected years.
Year | 2005 | 2006 | 2007 | 2008 |
Percent | 6.0 | 6.8 | 12.0 | 13.5 |
Source: Recording Industry Association of America.
(a) What was this percentage in 2006?
(b) Mentally estimate the average percentage for this 4-year period.
(c) Calculate the average percentage. Is your mental estimate in reasonable agreement with your calculated result?
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