Hello!
If I understood your question correctly, then we must find the volumes of the smaller and larger rectangular boxes, and we must subtract the smaller box's volume from the larger box's volume.
We must use a formula to find the volume of a rectangular prism. The formula is:
V = l × w × h
SMALLER BOX VOLUME:
V = l × w × h
V = 9 × 7 × 12
V = 63 in^2 × 12
V = 756 in^3
So, the volume of the smaller box is 756 cubic inches.
LARGER BOX VOLUME:
V = l × w × h
V = 10 × 10 × 15
V = 100 in^2 × 15
V = 1,500 in^3
So, the volume of the larger box is 1,500 cubic inches.
Now, subtract the volume of the smaller box from the volume of the larger box.
1,500 - 756 = 744
ANSWER:
The space between the two boxes that we contain Styrofoam peanuts will be 744 cubic inches.
Length = 90cm
solution: 332 - 76 - 76 = 180
180 ÷ 2 = 90
The answer is 12 inches for one side of the cover
14.6428 in decimal , in fraction 14 16/25