standard_description: Represent addition, subtraction, multiplication, and conjugation of complex numbers geometrically on the complex plane; use properties of this representation for computation. For example, (-1 + Ö3i)^(3) = 8 because (-1 + Ö3i) has modulus 2 and argument 120°.
problem_activity: A tank that measures
$$1\frac{1}{2}$$
feet across,
$$2\frac{1}{3}$$
feet wide, and
$$1\frac{1}{2}$$
feet tall, is filled halfway with water, as shown below. To fill the tank to the very top with water, how many cubic feet of water need to be added?
[IMG]


aligns: no