Answer: c I believe
Step-by-step explanation:
Answer:

Step-by-step explanation:
The volume of the pyramid is given by:

where
is the area of the base and
is the height.
We know that the height is:

Thus we need to find the area of the square at the base.
The perimeter of the square is:

this means that the length of the sides of the square is :

Now we can find the area of the base which the area of the square:

and finally we find the volume:


Which rounded to the nearest tenth of a cubic centimeter is: 
Answer: 19.65
Step-by-step explanation:
all you need to do is add 850.99 and 129.36 to get 980.35
then subtract 980.35 and 1000 and you get your answer
Answer:
?
Step-by-step explanation: