Question

Becca tracked the size of the grizzly bear population in the wilderness in Alaska. In 2020 (the first year she started recording) there were 1000 grizzly bears. Sadly, each year one-tenth of the population died. Calculate how many grizzly bears there will be in 2023.

Answer 1

in 2023, there will be 729 grizzly bears in the wilderness in Alaska.

Explanation:

Population in 2020: 1000 grizzly bears

Annual death rate: one-tenth of the population

To calculate the population in 2023, we need to calculate the population for each year from 2020 to 2023, taking into account the one-tenth death rate.

Year 2020:

Population = 1000 grizzly bears

Year 2021:

Population = 1000 grizzly bears - (1/10) * 1000 grizzly bears

Population = 1000 grizzly bears - 100 grizzly bears

Population = 900 grizzly bears

Year 2022:

Population = 900 grizzly bears - (1/10) * 900 grizzly bears

Population = 900 grizzly bears - 90 grizzly bears

Population = 810 grizzly bears

Year 2023:

Population = 810 grizzly bears - (1/10) * 810 grizzly bears

Population = 810 grizzly bears - 81 grizzly bears

Population = 729 grizzly bears

Therefore, in 2023, there will be 729 grizzly bears in the wilderness in Alaska.