You need to find the cost of one marker. You just simply have to divide the money by the number of markers. [tex]6 \div 20 = m[/tex] [tex]m = 0.3[/tex] Now to actually make it apply to the problem, you have to make sure there is a zero in the hundredths place. So it will look like this: [tex]m=0.30$[/tex]
