Which of the following ratios are equivalent to 6: 8?

9: 12
12 to 16
24: 36
16 to 24

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 solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.