The ABC and DEF hardware companies report their annual profits for the following items in thousands of dollars:
(a) Represent each company s profits as a separate 1 x 6 matrix.
(b) Using the two 1 x 6 matrices, determine the combined profits of the two companies.
(c) Suppose 6 x 1 a matrix was used for each company s profits, and their sum was used to represent the combined profit, how would the answer differ from the result in (b)?