Question: Endangered species the tables on the next page give the numbers of some species of threatened and endangered wildlife in the United States and in foreign countries in 2007.
(a) Write a matrix A that contains the number of each of these species in the United States in 2007 and a matrix B that contains the number of each of these species outside the United States in 2007.
(b) Find a matrix with the total number of these species. Assume that U.S. and foreign species are different.
(c) Find the matrix B - A. What do the negative entries in matrix B - A mean?