The expenditures E for government public health activities (in billions of dollars) can be approximated by
E = 5.03t2 + 100t + 1380
where t is the number of years past 2000 (Source: Centers for Medicare and Medicaid Services).
(a) What t-value represents the year 2010?
(b) Actual expenditures for 2010 were $2879 billion. What does the formula give as the 2010 approximation?
(c) Estimate the expenditures for 2015.