National Parks Are an Important Part of Our Heritage

question 20

Multiple Choice

National parks are an important part of our heritage,

• A)and they remain pristine and undisturbed because of their park status.
• B)but they lack any protection from mining,logging,and grazing.
• C)but they are endangered by overcrowding,pollution,and in some places,mining.
• D)but unfortunately exist only in remote inaccessible areas.
• E)but they are endangered by overcrowding.

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Definitions:

Matrix

A rectangular array of numbers, symbols, or expressions, arranged in rows and columns.

Matrix

A rectangular array of numbers, symbols, or expressions arranged in rows and columns used in mathematics to perform linear transformations and solve systems of linear equations.

Determinant

A scalar value that can be calculated from the elements of a square matrix and encapsulates certain properties of the matrix. It is often used to determine the invertibility of the matrix.

Cramer's Rule

A theorem in algebra that provides an explicit solution to a system of linear equations with as many equations as unknowns, using determinants.