Life expectancyThe following table gives the years of life expected at birth for blacks and whites…

Life expectancy

The following table gives the years of life expected at birth for blacks and whites born in the United States in selected years from 1920 to 2006.

whites

blacks

Males Females

Males Females

1920

54.4

55.6

45.5

45.2

1940

62.1

66.6

51.5

54.9

1960

67.4

74.1

61.1

67.4

1980

70.7

78.1

63.8

72.5

2000

74.9

80.1

68.3

75.2

2006

75.7

80.6

69.7

76.5

Make a matrix A containing the information for whites and a matrix B for blacks. Use these to find how many more years whites in each category are expected to live than blacks.

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