It is 7th-grade math so if you don't know it don't answer it all

9840

Step-by-step explanation:

Cubic centimeters used in final wood sculpture = volume of rectangular prism minus volume of triangular prism

To find the volume of a rectangular prism simply multiply the width by the length by the height

The rectangular prism has a given width of 20cm, a given height of 30cm and a given length of 20cm

So volume of rectangular prism = 20 * 20 * 30 = 12,000

Now let's find the volume of the triangular prism she cut out.

To find the volume of a triangular prism we can use this formula

V = bh/2 * l

Where b = base length, h = height of base and l = length of prism

The triangular prism has a given base length of 12cm a given height of 12cm and a given length of 30cm ( we can tell by looking at the image the length of the triangular prism is the same as the height of the rectangular prism.)

We then plug in these dimensions into the formula

V = (12*12)/2 * 30

12 x 12 = 144

144/2 = 72

72 * 30 = 2160

Finally we subtract the volumes

12,000 - 2160 = 9840

We can conclude that the volume of the final sculpture is 9840 cubic centimeters

9840

Step-by-step explanation:

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