Question

A certain forest covers an area of 2200km^2. Suppose that each year this area decreases by 3.75%. What will the area be after 7years?
round your answer to the nearest square kilometer.

Answer 1

@ganeshie8 please help me

Answer 2

Suppose it decreased by 1% each year

then you can see that each year there remains 0.99 times the original.

What is the the equavalent proportion using 3.75%?

Answer 3

um im not sure to be honest... math is really hard for me ive tried doing to problem myself like 20 times but get wrong each time

Answer 4

I've given you the method above

if it was 1% the proposrtion left is 1 - 1/100 = .99 (each year)
if it was 2% then the proportion left is 1 - 2/100 = .98 (each year)
If it was 3.5% then the the proprtion left would be 1 - 3.5/100 = .965 (each year)

so what would the number be in your question when 3.75% is lost?

Answer 5

.9625?

Answer 6

Yes - good

now- that amounr is left after each year so if you start with 2200 sq km then the table shows what happens year by year:



so what happemns after 7 years?