What subset is best described as nonnegative numbers?

Which subset of the number system includes such as 1/2, -5, and 0.75?

 What set pertains to the union of real and imaginary numbers?

True or False: Real numbers are composed of rational numbers only.

Which subset of the number system consists of numbers like -3,0, and 7?

Which of the following sets corresponds to the set of positive even integers?

Which subset of the number system includes like --$\sqrt[]{9}$ ,4/5, and -2.25?

What subset is described as any number expressed as the ratio of two integers a and b, and b is not equal to 0?

What subset of the number system includes numbers with non-repeating, non-terminating decimals?

Which subset of the number system includes numbers like $\sqrt[]{2}$ ,π (pi), and e?