The Value of U $C ( t ) = 3 t ^ { 2 } - 7 t + 50$

question 65

Multiple Choice

The value of U.S. trade with China from 1994 through 2002 can be approximated by $C ( t ) = 3 t ^ { 2 } - 7 t + 50$ billion dollars (t is time in years since 1994) .
Find an appropriate domain of C.

• A) \([ 0 , + \infty ]\)
• B) \([ 1994,2002 ]\)
• C) \([ 1994 , + \infty ]\)
• D) \([ 0,8 ]\)
• E) \([ 8 , + \infty ]\)

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Definitions:

Photoreceptors

Specialized cells located in the retina of the eye that convert light into electrical signals, enabling the sense of vision.

Cones

Photoreceptor cells in the retina of the eye responsible for color vision and function best in relatively bright light.

Accommodation

In physiology, accommodation refers to the ability of the eye to change its focus from distant to near objects, achieved through the adjustment of the lens curvature.

Iris Muscles

Muscular structures in the eye that adjust the size of the pupil to regulate the amount of light entering the eye.