Answer
The number of bits required per song is:
$44,100$ samples/sec $\times 16$ bits/sample $\times 180$ sec/song $\times 0.1$
(compression) $=12,700,800$ bits/song $=1,587,600$ bytes/song
(at 8 bits/byte)
If there are 16 $\mathrm{GB}$ available on your smartphone for music storage, then
the total number of songs that can be stored is approximately:
$16 \times 10^{9} / 1.587 \times 10^{6}=10,080$ songs
Work Step by Step
The number of bits required per song is:
$44,100$ samples/sec $\times 16$ bits/sample $\times 180$ sec/song $\times 0.1$
(compression) $=12,700,800$ bits/song $=1,587,600$ bytes/song
(at 8 bits/byte)
If there are 16 $\mathrm{GB}$ available on your smartphone for music storage, then
the total number of songs that can be stored is approximately:
$16 \times 10^{9} / 1.587 \times 10^{6}=10,080$ songs