An author needs to visit four cities to promote her new book. She can visit the cities in any order, but the ordering may change the cost of her flights. In how many different ways can the author visit the four cities?

eggs are a high protein food! dan is most likely to include them in his diet. according to my sources, "whole eggs are among the healthiest and most nutritious foods on the planet. they are loaded with vitamins, minerals, healthy fats, eye-protecting antioxidants and brain nutrients that most people don't get enough of. whole eggs are high in protein, but egg whites are almost pure protein."

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wow ty so much have a wonderful day : ).

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the text says "if you can read this you are awesome."