A piece of fabric costs $5.29 a yard. Which is an estimated cost of 16.3 yards of fabric?

Round $5.29 per yard to about $5 and 16.3 yards to about 16 yards. Then $5 × 16 = $80, so the estimated cost is $80, choice B. The exact cost is about $86, which is closest to $80 among the choices.

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