What is the sum of the durations of a standard appointment and a new patient appointment?

• A. 60
• B. 120
• C. 90
• D. 150

Answer: (C)

Adding two appointment durations means summing the times, keeping the same unit. To find the total time for both visits, you add their lengths together. In this scenario, the two durations combine to 90 minutes, so the total is 90 minutes. For example, if one lasts 30 minutes and the other 60 minutes, that adds up to 90. The key idea is simply adding the two time intervals.