Question

About 60,000 acres of wetlands are lost each year in the United states. What integer represents the change in wetlands after 4 years?

Answer 1

Over 4 years, there will be a loss of 60,000 acres per year, so 60,000 times 4 is equal to 240,000 acres. 240,000 is positive because the problem asks for the change, not the increase.

This is the work you will show

c=-60,000(4)

c=-240,000

So -240,000 represents the change.

You could also just count by -60,000 four times.

-60,000-60,000-60,000-60,000=-240,000.