What is the measure of missing angle indicated in these three illustrations

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

One integer is 8 times another. if the product is 72, then find the integers

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