A9-foot piece of wood is cut into shelves. if each is 3/7 foot in length, how many shelves are there?

Hello!

To find how much shelves we cut, we need to divide 9 feet by 3/7 feet. When dividing by fractions, it is like multiplying its reciprocal.

This means that the reciprocal of 3/7 is 7/3.

Therefore, if each shelf is 3/7 feet in length, then there are 21 shelves.

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step-by-step explanation: