Question

a recent 12 year period,, the total government payroll in the US can be modeled by P= 26t^2 + 1629t + 19,958, where P is the payroll in million of dollars and t is the number of years since the beginning of the 12 year period
1) Use the discrimnant to show that the payroll will reach 80 billion dollars in the future according to the model

2) use a graphhing calculator to find out how many years it will take for the total payroll to reach 80 billion dollars according to the model