Use the law of cosines to find the value of cos theta.

a) -0.72
b) 0.29
c) 0.78
d) 0.38

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