QUESTION 11 Retired persons travel by bus and automobile more frequently than do business executives, who more commonly use air travel. An economic explanation for this would be that a. business executives value their time more highly. b. business executives have more time to travel. c. retired persons have more money than do business executives. d. it is more important for retired persons to save time.

Which of the following is the energy of atoms vibrating inside an object? A. Thermal B. Radiant C. Mechanical D. Electrid

Session \( 2005 / 2006 \) 1. Given two complex numbers \( z_{1}=1+3 i \) and \( z_{2}=2-i \), express \( \frac{z_{1}+z_{2}}{z_{1} z_{2}} \) in the form of \( a+b i \), where \( a \) and \( b \) are real numbers. Hence, determine \( \left|\frac{z_{1}+z_{2}}{z_{1} z_{2}}\right| \).

Aufgabe 3: Wie schreiben Sie als \( 1 \times 10^{\text {n }} \) die folgenden Begriffe? Nennen Sie je ein praktisches Beispiel (Abkürzung der Einheiten) ( 6 Punkte) Dezi, Mili, Mikro, Hekto, Kilo und Giga

Explain the following statement "A property is said to hold almost everywhere (a.e on a set". (2 Marks)

(a) Given the complex number \( z \) and its conjugate \( \bar{z} \) satisfy the equation \( z \bar{z}+2 z=12+6 i \). Find the possible values of \( z \).