The UN Food Agriculture Organization evaluates that 2.17% of world's natural forest's existing in 1990 were gone by the end of decade. In 1990, world's forest cover stood at 4077 million hectacres.
i.) How many millions hectares of natural forests were lost during 1990's?
ii.) How many millions hectares of natural forests existed in year 2000?
iii.)Write the exponential formula approximating number of million hectares of natural forest in world t years after 1990.
iv.) Determine annual percent decay rate during 1990's.?
v.) During years 2000 through 2005, world's natural forests decreased by approximately .18% per year. Approximately how many million hectares of natural forests existed in year 2005?
vi.) Let F(t) number of millions hectares of natural forests in world t years after 1990. Determine the piecewise formula for F(t) for 0<=t<=15.