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A survey estimated that the average cost of textbooks for a semester of college is $320 with a margin of error of ± 8%. What is the range of the possible average cost of text books?
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A survey estimated that the average cost of textbooks for a semester of college is $320 with a margin of error of ± 8%. What is the range of the possible average cost of text books?

User Martin Sherburn
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User Pana
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8% x 320= 25.6
320+25.6=345.6
320-25.6=294.4
range= 294.4 to 345.6
User Ess
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