Question

A population of deer in an area is 2000 and is decreasing at a rate of 15% per year. At this rate, approximately what will the deer population be in 7 years?

Answer 1

642

Explanation:

Here p = 2000, r = 15 and t = 7 Let A be the no of deer after 7 years.
We know while decreasing,
A = `P (1-r/100)^7`
So, A = `2000(1-15/100)^7`
Or, A = `20000 xx 0.3205771`
Or, A = `2000 xx 0.321`
Or, A = 642