What cumulative exposure limit would be applicable for a 50-year-old person?

The cumulative exposure limit for radiation workers is calculated based on their age in years, with the guideline typically being the worker's age multiplied by a standard exposure limit of 1 rem per year. For a 50-year-old individual, this translates to:

50 years × 1 rem/year = 50 rem

This cumulative exposure limit reflects the long-term risk associated with radiation exposure and aims to ensure safety by allowing a manageable amount of radiation over a person's working life. The value of 50 rem aligns with established guidelines by regulatory bodies that seek to protect the health and safety of radiation workers throughout their careers.

In this context, the answer correctly represents the cumulative dose that is considered safe and manageable for someone who is 50 years old, as it directly correlates with their age and follows the recommended standards for occupational exposure. The other options represent either significantly lower limits or different units of measurement that do not apply in the same way at this age.