Final answer:
A total of 5 large EKG strip boxes represents 25 seconds of time.
Step-by-step explanation:
A total of 5 large EKG strip boxes represents 25 seconds of time.
Each large EKG strip box represents 5 small boxes, and each small box represents 0.04 seconds.
Therefore, 5 large EKG strip boxes represent: 5 (large boxes) x 5 (small boxes) x 0.04 seconds = 1 second.
So, 5 large EKG strip boxes represent 25 seconds of time.