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Ann [662]
3 years ago
8

A city that had 40,000 trees started losing them at a rate of 10 percent per year because of urbanization.

Mathematics
1 answer:
goblinko [34]3 years ago
7 0

Answer:

t = 13.1576  years

Step-by-step explanation:

The situation can be modeled as

P = Po.(1-r)^t

Where

t is the years transcurred

Po is the initial amount

r is the rate of change

Po = 40000

r = 10% equivalent to 0.1

Now

A quarter of the original amount

(1/4)*Po = Po.(1-r)^t

(1/4) = (0.9)^t

t = 13.1576

Please, see attached picture

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