Based on the U.S. censuses taken from 1850 through 2000, the population of the United St...

Based on the U.S. censuses taken from 1850 through 2000, the population of the United States can be approximated by the equation

where x is the year and y is the approximate U.S. population in millions. Using this equation, find the approximate population for

(a) 1900 (b) 1950

(c) 2010 (d) 2020

(e) 2050

(f) Will the population reach 400 million by 2045? Will the population reach 500 million by 2070?