A small fast-food chain with restaurants in Santa Monica, Long Beach, and Anaheim sells only hamburgers, hot dogs, and milk shakes. On a certain day, sales were distributed according to the following matrix. Number of items sold Santa Long Веach Anaheim Monica Hamburgers 4000 1000 3800 Hot dogs 700 600 500 = A Milk shakes 700 500 9000 The price of each item is given by the following matrix. Hamburger Hot dog Milk shake [$1.00 $1.40] - $0.50 (a) Calculate the product BA. |$| (b) Interpret the entries in the product matrix BA. O Total revenue in hamburgers, hot dogs, and milk shakes, respectively. O Total revenue in Santa Monica, Long Beach, and Anaheim, respectively.

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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.