Solution: Better buy $ 19.24 for 20 packs of gum.
Analysis: As we want to compare two purchase options of packs of gum, we need to find the rate of each option. In this case, we want to find the rate: Price per 1 pack of gum. We find it calculating the total price between the number of packs of gum.
Option 1:
[tex]Rate=\frac{29.38}{30}=0.9793\cong0.98[/tex]Option 2:
[tex]Rate:\text{ }\frac{19.24}{20}=0.962\cong0.96[/tex]After we find both rates, let's compare them:
[tex]0.98>0.96[/tex]For that reason, we can assume the best purchase option is $ 19.24 for 20 packs of gum.
