A bag contains 12 blue marbles, 15 red marbles, and 13 purple marbles. If Monty randomly draws a marble from the bag (and puts it back) 20 times, how many times should he expect to pull a blue marble?

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

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?

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.