Answer:
D
Step-by-step explanation:
this problem is very much similar to the last one, first we calculate the volume for the shape as shown
1 1/2 * 1 1/2 * 1 = 2 1/4
to figure out how many half cubes fit inside a fourth of a cube, we can just divide the half cube amount by 4
8 / 4 = 2
so 1/4 cube unit = 2 half cube units
and since there are two whole cube units already, we can multiply the half cube units by 2 (per whole cube unit)
8 * 2 = 16
then we add the half cube amounts we came up with
16 + 2 = 18
so the volume is 2 1/4 and the half cube count is 18