Patients in a large hospital have a choice of four menus, each with meat, potato, vegetable, salad, and dessert. For example, Menu 1 has baked ham, sweet potatoes, peas, green salad, and baked apples. Matrix C gives the cost per serving (in cents) for each item in these menus. Matrix D gives the number of menus ordered each day last week.  a. Explain the meaning of CtD and DtC.  b. Let A be the 5 x 1 matrix whose elements are all 1. Find CA. What information does CA give?  c. Let B be the 1 x 4 matrix whose elements are all 1. Find BD. What information does BD give

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.