I wanna say its b)1 but im not 100% sure. if its wrong im sorry
Step-by-step explanation:

Answer: 432cm^3
Step-by-step explanation:
Answer:
B.
Step-by-step explanation:
In mathematics, a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a symbol, called the imaginary unit, that satisfies the equation i² = −1. Because no real number satisfies this equation, i was called an imaginary number by René Descartes.