The poloynomial 0.0052x3-0.0041x2+0.145x+1.15 gives the approximate total earnings of a company in million of dollars where x=0 corresponds to 1996 x=1 corresponds to 1997 and so on this model is valid for the years from 1996 to 2000 determine the earnings for 1998

Solution:

    0.0052x3 - 0.0041x2 + 0.145x + 1.15

For 1998 ; x = 2

    0.0052 (2)3 - 0.0041 (2)2 + 0.145(2) + 1.15

= 1.4652 millions