4We're asked to solve the following:[tex]\sf 2\div\cfrac{1}{2}[/tex]Rewrite:[tex]\sf \cfrac{2}{1}\div\cfrac{1}{2}[/tex]Flop the second fraction:[tex]\sf \cfrac{2}{1}\div\cfrac{2}{1}[/tex]Multiply:[tex]\sf \cfrac{2}{1}\times\cfrac{2}{1}[/tex][tex]\sf 2\times2[/tex][tex]\sf 4[/tex]