Civilian labor force the table gives the size of the civilian labor force (in millions) for selected years from 1950 and projected to 2050. These data can be modeled by y = 20.0001x3 + 0.0088x2 + 1.43x + 57.9 where x is the number of years past 1950. Use the model to find the year when the second derivative predicts that the rate of change of civilian labor force begins to decrease.
