By using U.S. Census Bureau data for selected years from 1980 and projected to 2040, the number

Question:

By using U.S. Census Bureau data for selected years from 1980 and projected to 2040, the number of White non-Hispanic individuals in the U.S. civilian non-institutional population age 16 years and older, in millions, can be modeled by the function
P(t) = 96.1 + 17.4 ln t
where t is the number of years past 1970.
(a) Find P'(t).
(b) Find and interpret P(58) and P'(58).