we know that
A jar of jelly that weighs [tex]4.25[/tex] ounces costs [tex]\$2.89[/tex]
so
by proportion
Find the cost of one ounce
[tex]\frac{2.89}{4.25}\frac{\$}{ounces} = \frac{x}{1}\frac{\$}{ounce}\\ \\x=\frac{2.89}{4.25}\\ \\x=\$0.68[/tex]
therefore
the answer is
[tex]\$0.68[/tex]
