US health-care expenditures in 2010 reached 2.47 trillion dollars. It is difficult to predict future health-care cost. One prediction is that in the near term, they will grows by 6.5% each year. Assuming that this growth rate continues, choose the formula that gives health-care expenditures as a function of time?

A) 2.47 + 0.065t

B) 2.47(0.065)^t

C) 2.47^t

D) 2.47(1 + 0.065)^t

If the trend continues, what will the health-care expenditures be in 2030?