Final answer:
Carla Sanborn's age for insurance purposes was 42 years when she purchased the insurance.
Step-by-step explanation:
To determine Carla Sanborn's age for insurance purposes, we need to calculate how old she was on October 25, 1977, the date she purchased the insurance. To do this, we subtract her birth year (1936) from the year she purchased the insurance (1977), then add 1 if her birth month (July) is greater than October. Here's the calculation:
Age = 1977 - 1936 + (1 if July > October)
Simplifying further, we have:
Age = 41 + 1 = 42 years
Therefore, Carla Sanborn's age for insurance purposes was 42 years when she purchased the insurance.