The bottom of the inside of a rectangular prism is completely covered with a layer of letter cubes, as shown.

A rectangular prism is shown. The bottom of the inside of the prism is completely covered with a layer of letter cubes. The figure is not drawn to scale. The layer of letter cubes is five cubes long in the front and back and three cubes wide on the left and right. [3]

The edges of each letter cube are
1
1
2
inches long.

Part A
What are the length and the width, in inches, of the bottom of the inside of the prism?

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Part B
The height inside the rectangular prism is
3
4
foot.

How many layers of letter cubes can fit inside the prism? Show or explain how you determined your answer.

Enter your answer and your work or explanation in the space provided.

Part C
The weight of the prism when empty is
1
4
pound. The weight of the prism when it is completely filled with letter cubes is 4 pounds.

What is the weight, in ounces, of one letter cube? Show or explain how you determined your answer.

Enter your answer and your work or explanation in the space provided.