Reply: 10 seconds
Clarification: When giving first aid, since Mr. Goodman is unresponsive, the next action involves opening the airway by tilting the head and lifting the chin.
While maintaining an open airway, observe, listen, and feel for breaths. Spend up to 10 seconds assessing for breathing, as it is crucial before concluding that breathing has stopped, which necessitates starting CPR as the subsequent measure.
