Confused on number 5
can someone plz help

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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?

How do you find principle and simple interest