Answer:
d. 
Step-by-step explanation:
We have been given that Cheng measures each edge of each base to be 2 feet. The height of the whole sculpture is 6 feet.
First of all, we will find height of each pyramid by dividing height of whole sculpture by 4 as:

We know that volume of a pyramid is equal to 1/3 of base area times height that is
, where b represents area of base.

Since volume of one pyramid is equal to 2 cubic feet, so volume of 4 pyramids will be 4 times 2 cubic feet that is 8 cubic feet.
Therefore, Cheng must purchase 8 cubic feet of material.
Answer: x=5 and x=-1
Step-by-step explanation:
X^2-4x-5=0
(X-5) (x+1)=0
X-5=0. And. X+1=0
Answer:
The answer is -7.15, hope this helps.
Answer:
The answer is True.
Step-by-step explanation:
The end answer is a postive one it is not a negative number.
I think the missing number should be
12.87