A local bookstore owner buys a book for $15 and adds a 20% markup when she sells it in her store. Later, to reduce inventory, all books are on sale for 20% off. How much more did the owner pay for the book compared to its final selling price?

Raj encoded a secret phrase using matrix multiplication. using a = 1, b = 2, c = 3, and so on, he multiplied the clear text code for each letter by the matrix to get a matrix that represents the encoded text. the matrix representing the encoded text is . what is the secret phrase? determine the location of spaces after you decode the text. yummy is the corn the tomato is red the corn is yummy red is the tomato