Acity that had 40,000 trees started losing them at a rate of 10 percent per year because of urbanization. in approximately__ years, the number of trees in the city reduced to a quarter of the original amount. hint: model the situation as p = p0(1 − r)t.

Original Number of trees = P₀ = 40,000
Rate of decrease = r = 10% = 0.10

We want to find when the number of trees will be one quarter of the original number. One quarter can be expressed as 25%, so we want to find when the number of trees is 25% of P₀ .

Using the given equation, we can write:



Thus, in approximately 13 years, the number of trees in the city will be reduced to a quarter of the original amount.

If you divide 0.1 and 0.6 you wii get 0.166666 which rounds to .167 which is answer b