Final answer:
Approximately 123.75 mg of caffeine are in a 6-ounce cup of perked coffee.
Step-by-step explanation:
The approximate amount of caffeine in a 6-ounce cup of perked coffee can be determined by comparing it to the amount of caffeine in other beverages. A 16-ounce Starbucks Grande Coffee contains about 330 milligrams (mg) of caffeine.
By using the proportion between the size of the cup and the amount of caffeine, we can estimate that a 6-ounce cup of perked coffee would contain approximately 123.75 mg of caffeine.