According to the US Census Bureau, the population of the United States has been growing at an average rate of approximately 2% per year. The census is taken every 10 years, and the population in 1980 was estimated at 226 million people.

*If the rate of population growth in the U.S. had continued at about 2%, in about what year would the population in the United States reach and surpass one billion?
My answer: 773 years ?????