I don't know if that's your whole question, but I'm going to say 153,729,991.
One hundred fifty three million, seven hundred twenty nine thousand, nine hundred ninety one.
I believe the correct answer is C.
The formula of pyramid is 1/3 Bh where B is area of base and h is height.
So it's just V = (1/3)·10·10·12 = 400
Final answer: 400 ft³
It is a rational number and it equals 0.5 or 1/2
