Based on data from 1980 to 2005, the value of the dollar based on producer prices can be modeled by(V) = −0.00004785tt^{3}+ 0.02314t^{2}− 0.04774+ 1.137t

wheretis the number of years since 1980.†

Write the formula forP(t) given(P) = 100t(V).t