According to data from a medical association, the rate of change in the number of hospital outpatient visits, in millions, in a certain country each year from 1980 to the present can be approximated by f (t) = 0.001356t(1 - 1980)1 25 . where t is the year. a. Using the fact that in 1980 there were 240,487,000 outpatient visits, find a formula giving the approximate number of outpatient visits as a function of time. b. Use the answer to part a to forecast the number of outpatient visits in the year 2015. a. The number of outpatient visits as a function of time is f() = b. The forecasted number of outpatient visits in 2015 will be about (Round to the nearest million as needed.)