Identify the given number as "Rational", "Irrational", or "Not a real number". If the number is rational, give its exact value. If the number is irrational, give a decimal approximation to the nearest thousandth.- 

A. Irrational, -9.000
B. Not a real number
C. Rational, -9
D. Irrational, -40.500


Answer: C

Mathematics

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