Can you help me solve this?

Is this a polynomial function? i need to know asap

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

For the inequality |c| < |d| to be true, which of the following must be true?