Answer:
thats long just use calcukator
Answer:
(a) 
Step-by-step explanation:
The question is incomplete. (See comment for complete question).
From the completed question, we have:

--- number of pyramids
Required
An expression for the area of the base
The total base length of the pyramid represents the perimeter of the base.
And since the base is a square, then the following relationship exist.

Where L represents the length of each side.
This gives

Make L the subject

The area of the base is then calculated as:


It could be 30 to 31 but February has 28 expected from a leap year with 29 days
Answer:
yes
Step-by-step explanation:
I think you did the question correctly. good luck