Polar bears are listed as a threatened species in 2005 there were about $25,000 polar bears in the world if the number of polar bears declined by a thousand each year and what year will polar bears become extinct
If the number of polar bears decreased by 1,000 each year starting from 2005, we can determine the number of years until there are no polar bears left.
Let's define the following variables:
- N: initial number of polar bears in 2005 (N = 25,000)
- Y: number of years until polar bears become extinct
- X: number of polar bears remaining after Y years
We can use the following equation to represent the decrease in the number of polar bears each year:
X = N - 1,000Y
When X reaches zero, it means there are no polar bears remaining. So, we need to find the value of Y that makes X equal to zero:
0 = N - 1,000Y
1,000Y = N
Y = N/1,000
Now, let's plug in the value of N = 25,000 into the equation and calculate Y:
Y = 25,000/1,000
Y = 25
Therefore, if the number of polar bears continues to decline by 1,000 each year, polar bears will become extinct after approximately 25 years.