Problema Solution
A certain forest covers an area of 4000 km 2 Suppose that each year this area decreases by 5.5% What will the area be after 9 years?
Answer provided by our tutors
this year the area is: 4,000 km^2
after 1 year the area will be: 4,000 - 0.055*4,000 = (1 - 0.055)4,000
after 2 years the area will be: (1 - 0.055)4,000 - 0.055*(1 - 0.055)4,000 = ((1 - 0.055)^2)4,000
after 9 years the area will be: ((1 - 0.055)^9)*4,000 = 1,404.1 km^2.