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An element is decaying according to the model given by y left parenthesis x right parenthesis space equals open parentheses 1 third close parentheses to the power of x space plus space 7 where x is measured in days and y(x) is measured in grams. Explain the correct meaning of the 7 in this situation. A. Initially, seven grams of the element were present at x = days.

B. The element is decaying at a rate of 7 grams/day.

C. After 7 days, there is 1/3 of the element remaining in grams

D. As the days continue to increase, the amount of element left approaches 7 grams.

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