List all the given numbers that are (a) integers, (b) rational numbers, (c) irrational numbers, (d) real numbers, and (e) imaginary numbers. \[ 9, \sqrt{-16}, \frac{\sqrt{2}}{4},-2,-\frac{\pi}{2}, \frac{1}{6},-\sqrt{-7},-2.99 \]

Q9. What does the term "excavation" refer to in construction safety? (a) The process of removing debris from a construction site (b) The digging of trenches/foundation pits (c) The transportation of construction materials (d) A method to treat unstable slopes Q10. Which of the following is a safe practice for handling hazardous materials in construction? (a) Storing near heat sources (b) Storing near other hazardous materials (c) Using appropriate containers and labels (d) Storing near machinery Q11. Which of the following is a safe practice for operating heavy machinery in construction? (a) Operating with limited training (b) Ignoring safety signs (c) Inspect machinery before use (d) Multitasking while operating Q12. What is the purpose of a safety training program in construction? (a) To educate workers on construction techniques (b) To promote teamwork and collaboration (c) To enhance productivity and efficiency

10. Why did Vinland seem like an ideal place for settlement?

Q1. What is the best way of dealing with a hazard to ensure others are not put at risk? (a) Remove it immediately (b) Leave it for others to sort out (c) Enclose the area with caution tape (d) Display a notice or warning sign Q2. The legal responsibilities of an employer with regards to health and safety include what? (a) Charging employees for damaged or lost PPE (b) Provide safe work systems for employees (c) Provide insurance for dangerous work (d) Assign dangerous tasks to specific employees

13 puntos Considere la transformación \( T: \mathbb{R}^{2} \rightarrow P_{3} \) definida por \[ T\binom{a}{b}=a+b+(a-b) x+(2 a+b) x^{2} \] a) 5 puntos Halle una base para el núcleo de \( T \) y su nulidad.

Q3. What is the primary purpose of personal protective equipment (PPE)? (a) To enhance worker comfort (b) To improve worker productivity (c) To reduce the risk or injury (d) To comply with company dress code Q4. What should you do if you identify a potential hazard in the workplace? (a) Ignore it and continue working (b) Report to a supervisor (c) Try to fix without notifying anyone (d) Discuss at the next safety meeting Q5.What is an example of an ergonomic hazard? (a) Loud noise (b) Poor lighting (c) Heavy lifting (d) Chemical exposure