The national health care expenditure H (in billions of dollars) can be modeled (that is, accurately approximated) by the formula
H = 738.1(1.065)t
where t is the number of years past 1990.
(a) What t-value corresponds to 2000?
(b) Approximate the national health care expenditure in 2000.
(c) Approximate the national health care expenditure in 2010.
(d) Estimate the national health care expenditure in 2018.