I think 7 is B and 8 is A, but im not really sure about this so im sorry if this is wrong
The general rule is that
Volume of Pyramid = (1/3)*(Volume of Prism)
Or
Volume of Pyramid = (Volume of Prism)/3
Which is why the answer is choice B) one third of the volume of the prism
side note: we can multiply both sides by 3 to get
Volume of Prism = 3*(Volume of Pyramid)
The prism and pyramid must have the same base and altitude
Not math but American settlers were only in east so I. Check the section to see what area.