3.9yardsis equal to 140.4inches.We have,The concept used toconvert3.9yardstoinchesis the conversion factor between yards and inches. The conversion factor states that 1 yard is equal to 36 inches.Bymultiplyingthe given value in yards (3.9 yards) by the conversion factor (36 inches/yard), we can convert the measurement from yards to inches.This concept of using aconversionfactorallows us to convert between different units of measurement.Toconvert3.9yardstoinches, we can use the fact that 1 yard is equal to 36 inches.So, toconvert3.9 yards to inches, we multiply 3.9 by 36:3.9 yards * 36 inches/yard = 140.4 inchesTherefore,3.9yardsis equal to 140.4inches.Learn more aboutunitconversionhere:brainly.com/question/13899873#SPJ6...

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