?Suppose that the U. S. population for the years 1920, 1930, 1940, and 1950 is shown in the table below. Let x represent the number of decades since 1920. Estimate the population in 1970 by using a cubic polynomial that fits these data. 
?
 Year 1920 1930 1940 1950 Population (in millions) 118 138 148 166??

A. ?448 million
B. ?278 million
C. ?236 million
D. ?298 million
E. ?210 million


Answer: D

Mathematics

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