Answer:
[tex]\mathrm{b.\:}0.17\:\mathrm{miles/minute}[/tex]
Explanation:
Average speed is given by [tex]S=\frac{d}{t}[/tex] where [tex]d[/tex] is total distance and [tex]t[/tex] is time.
Plugging in given values, we get:
[tex]S=\frac{5\:\mathrm{miles}}{30\:\mathrm{minutes}}=\fbox{$\mathrm{b.\:}0.17\:\mathrm{miles/minute}$}[/tex].