Respuesta :

20 A strip of wood 78 inches long can be cut into 20 3 3/4 inch pieces. (78/3.75 = 20.8 Since you can't have a .8 piece of wood, the answer is 20)
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The whole length of wood is measured to be 78 inches. It is to be cut into smaller pieces measuring 3 (3/4) or 3.75 inches long. To calculate how many pieces the strip of wood can be cut, we divide 78 into the smaller measurement.

78 / 3.75 = 20.8 or 21

Therefore, the correct answer is option D, 21.

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