SOLUTION: It is estimated that at the present rate of deforestation in El Salvador, in 20 years only 53% of the present forest will remain. How long will it take to remove 95% of the forest?

Question 107575: It is estimated that at the present rate of deforestation in El Salvador, in 20 years only 53% of the present forest will remain. How long will it take to remove 95% of the forest?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
I'm assuming this is a linear relation with a negative slope.
I want the vertical axis to be p = percent of present forest
remaining
The horizontal axis is years from the present
The points given are
P1 = (20,.53)
P2 = (x,.05) note that 95% removed leaves 5% left
Also I have the p-intercept (0,1) where 0 represents the present
The equation is note that when x=0, p = 1
The slope is

The question is, when p = .05, what is x?

years answerThis is about 40 y 5 m 5 d

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