Using data from 2002 and with projections to 2024, total annual expenditures for national health care (in billions of dollars) can be described by E = 4,61x2 + 43.4x + 1620 where x is the number of years past 2000.t If the pattern indicated by the model remains valid, in what year does the model predict these expenditures will reach $15,315 billion?

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