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lozanna [386]
3 years ago
7

A 9-foot piece of wood is cut into shelves. If each is 3/7 foot in length, how many shelves are there?

Mathematics
1 answer:
Aloiza [94]3 years ago
6 0

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.

9 / \frac{3}{7} = \frac{9}{1} * \frac{7}{3} = \frac{63}{3} = 21

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

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Step-by-step explanation:

To identify the volume of the composite figure, you can divide it in the known figures there, in this case, you can divide the figure in a cube and a pyramid with a square base. Now, we find the volume of each figure and finally add the two volumes.

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Finding the volume of a cube is actually simple, you only must follow the next formula:

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<em>VOLUME OF THE PYRAMID. </em>

The volume of a pyramid with a square base is:

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<em>h = height. </em>

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