Question

what type of number is 18.62? choose all answers that apply: a real b imaginary c complex

Explanation:

• Real numbers include all rational and irrational numbers, and 18.62 is a rational (decimal) number, so it is real.
• Imaginary numbers are multiples of \(i = \sqrt{-1}\), and 18.62 has no imaginary component, so it is not imaginary.
• Complex numbers are in the form \(a + bi\), where \(a,b\) are real and \(i\) is imaginary. For 18.62, \(b = 0\), so it can be written as \(18.62+0i\), making it a complex number.

Answer:

A. Real, C. Complex