Question

Read the following word problem to determine population change to answer the following question: There is a population of 100 horses on an island. Over the course of a year 10 horses were born, 5 horses passed away, 10 horses emigrated from the island and 5 horses immigrated to the island. What is the new population at the end of the year?(1 point)
Responses

The population would still be 100 because the net change is zero
The population would still be 100 because the net change is zero

The population would 90 because the net change is minus ten
The population would 90 because the net change is minus ten

The population would 110 because the net change is plus ten

Answer 1

To determine the new population at the end of the year, we need to calculate the net change based on the births, deaths, emigrations, and immigrations.

Starting population: 100 horses

- Horses born: +10
- Horses passed away: -5
- Horses emigrated: -10
- Horses immigrated: +5

Now we calculate the net change:
Net change = (Horses born) - (Horses passed away) - (Horses emigrated) + (Horses immigrated)
Net change = 10 - 5 - 10 + 5
Net change = 10 - 5 - 10 + 5 = 0

Now, we add this net change to the initial population:
New population = Starting population + Net change
New population = 100 + 0 = 100

Therefore, the new population at the end of the year is still 100 horses.

The correct response is:
**The population would still be 100 because the net change is zero**.