A pyramid is a three-dimensional shape with one base and triangular lateral faces. The volume V of a pyramid is one third the area of the base B times the height h.
In the case of this pyramid, B is found by

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.