Answer:
500 days
Step-by-step explanation:
The United States consumes approximately 20 million i.e. 20,000,000 barrels of oil per day.
According to the USGS estimate, the technically recoverable oil resource in ANWR supply the total United States demand for oil for
days.
Here, USGS stands for United States Geological Survey and ANWR stands for Arctic National Wildlife Refuge.