Me in these
if a figure is a rectangle, what else must it be?
if a figure is a parallelogram, what else must it be?
if a figure is a square, what else must it be?
if a figure is a rhombus, what else must it be?

18.8 cubic inches.

step-by-step explanation:

volume of a cone = πr²h

r = 1.5 inches

h = 8 inches

pi = 3.14

volume of our cone = × 3.14 × 1.5² × 8 = 18.84 square inches

or equals to 18.8 square inches rounded up to nearest tenth.

4x and 6y

im not sure though