Please help fast, thanks! How do you determine if a ratio rate or percent is best to use in any given situation?

Amuffin recipe, which yields 12 muffins, calls for cup of milk for every 1 cups of flour. the same recipe calls for cup of coconut for every cup of chopped apple. to yield a batch of 30 muffins, how much flour will be needed in the mix?

Roy has 4 1/2 pizzas for the soccer team to split after the game. if each member is going to get 1/2 of a pizza, how many players are on the soccer team

For the right triangle shown, the lengths of two sides are given. find the third side. leave your answer in simplified, radical form.