Can someone teach me how to solve this please

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?

What does independent variable and dependent variable mean in math?