Rational numbers
1. -7/10÷3/5
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2. 23.5/8÷2
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3. 3 1/4÷ -2/5
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4. -5 1/3÷-1 4/5
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An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .