A 20-pound bag of dog food costs $16.20. A 30-pound bag of the same dog food costs $24.90. Which bag of dog food is the better buy?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

Damon makes 20 cups of lemonade by mixing lemon juice and water. the ratio of lemon juice to water is shown in the tape diagram. lemon juice\text{lemon juice} lemon juice water\text{water} water how much lemon juice did damon use in the lemonade? cups

Yo need asap pls ! markin da brainiest too !