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A simple index of three stocks have opening values on day 1 and day 8 as shown in the table below. What is the rate of change of this simple index over one week? Round your answer to the nearest tenth. A. 12.8% B. –11.4% C. –12.8% D. 11.4%

User Saso
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It's -11.4, I just took the quiz
User Leinir
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