Question: A ( x ) = - 1 . 4 2 7 x 2 + 2 4 . 7 6 6 x - 5 4 .

A(x)=-1.427x2+24.766x-54.44 million iPods, where x is the number of years since 2000.
The input notation is and the input units are
The input description is
The output notation is and the output units are
The output description is
The input interval can be written as
 A(x)=-1.427x2+24.766x-54.44 million iPods, where x is the number of years since

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