Determine if each relationship represents a function choose yes or no for each relationship

Three cylinders have a volume of 2836 cm^3. cylinder a has a height of 900 cm. cylinder b has a height of 225 cm. cylinder c has a height of 100 cm. find the radius of each cylinder. use 3.14 as an approximate for π

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?