The Tables Below Give the Numbers of Some Species of Threatened

question 15

Multiple Choice

The tables below give the numbers of some species of threatened and endangered wildlife in the United States and in foreign countries in 2003. Let A represent the matrix that contains the number of each of these species in the United States in 2003 and B represent the matrix that contains the number of each of these species outside the United States in 2003. Find the matrix B - A. What do the negative entries in matrix B - A mean? ​
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• A) ​ The negative entries tell us that that particular species is extinct.
• B) ​ The negative entries tell us how many more endangered or threatened species are in foreign countries.
• C) ​ The negative entries tell us that there are more endangered or threatened species in foreign countries.
• D) ​ The negative entries tell us that that particular species is extinct.
• E) ​ The negative entries tell us how many more endangered or threatened species are in the United States.

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Definitions:

ΔG°

Standard Gibbs free energy change, a thermodynamic quantity indicating the spontaneity of a reaction at standard conditions; negative values suggest spontaneity.

Exothermic

A chemical reaction or process that releases heat to its surroundings.

Endothermic

Describes a process or reaction that absorbs energy from its surroundings, typically in the form of heat.

Equilibrium Concentration

The concentration of reactants and products in a chemical reaction that remains constant over time at equilibrium.