Any one wanna zoom I NEED HELP WITH MY MATH AND ITS BETTER TO TALK ON THERE THEN TYP THANKS GUYS

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

Acircle has a circumference of 7.850 units. what is its radius?

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