The number of bank debit cards issued (inmillions) if given by the functionC(x)=-0.31x+5.8x2-15x +9, where 'x' is

The number of bank debit cards issued (inmillions) if given by the functionC(x)=-0.31x³+5.8x2-15x +9, where 'x' is thenumber of years since 1990.How many debit cards were issued in the year1993?0.51 million debit cards9 million debit cards7.83 million debit cards2431 million debit cards24.57 million debit cards