Quiz
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if the discriminant of a quadratic equation is equal to -8, which statement describes the roots?
there are two complex roots.
there are two real roots.
there is one real root.
there is one complex root.

The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) compute the z-score corresponding to the individual who obtained 42.342.3 miles per gallon. interpret this result.