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The following formula models the number of automobiles,A, in thousands, that Washington residents purchasedxyears after 1980. A = 2 x 2 + 1 8 x

The following formula models the number of automobiles,A, in thousands, that Washington residents purchasedxyears after 1980.

A=2x2+18x+302

What is the first year in which residents purchased approximately 806 thousand cars.

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