I bought 10 1/4 yards of ribbon. I used 7 3/4 yards of ribbon on a project
2 answers:
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Answer:
Step-by-step explanation:
, where b, h, w are base, height and width respectively.
, where h is the height, and A_b is the area of the base.
First let's calculate the volume of the paralelipiped by the first formula.
Then let's find out the height of the pyramid, which is 12 - 4 = 8 in.(See drawing)
Then the area of the base of the square pyramid is simply.
Now we can find the volume of the pyramid.
To find the total volume, let's add both volumes.
Start with
Multiply both sides by 3:
Recall that 21/5=4.2 to claim the correct answer.