Downloading music. To download a 4 MB song with a 56 Kbs modem takes an average of 15 minutes. Use absolute value notation to write an expression that describes the difference between this average time and the actual time it took to download the following songs. Then evaluate that expression.
a. Irreplaceable (Beyonce): 14 minutes
b. Fallin' (Alicia Keys): 17.5 minutes
c. Your Song (Elton John): 9 minutes
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