Can someone make sure I did this right?
A certain forest covers an area of 4300km^2. Suppose that each year this area decreases by 7.75%. What will the area be after 15 years?Use the calculator provided and round your answer to the nearest square kilometer.
p=4300km^2
r=0.075
t=15
F=430KM^2(1-0.0775)^15 = 128.22245212km2

Question

Can someone make sure I did this right? 
A certain forest covers an area of 4300km^2. Suppose that each year this area decreases by 7.75%. What will the area be after 15 years?Use the calculator provided and round your answer to the nearest square kilometer.
 p=4300km^2
r=0.075
t=15
F=430KM^2(1-0.0775)^15 = 128.22245212km2

triciaal · Answer

typo  430 s/b 4300

I think right formula

teller · Answer

they gave us the formula of f=p(1+r)^t or f=p(1-r)^t

teller · Answer

from what I know I plugged it in right.

triciaal · Answer

I did not verify the calculation

phi · Answer

tricaal is saying use  4300km^2.   You used 430

teller · Answer

Oh sorry

teller · Answer

1282.22452118km2 ?

phi · Answer

round your answer to the nearest square kilometer.

teller · Answer

so would it be 1283?

triciaal · Answer

no    to round  when less than 1/2 way to what you need you drop

teller · Answer

Huh?

phi · Answer

is 1282.2 closer to 1282 or 1283 ?

teller · Answer

1282

triciaal · Answer

here you have 1282.2   and you need  whole number  1282  then 1283

teller · Answer

so 1283?

phi · Answer

the rule is if you have 1282.5  (5 or bigger in the 10ths place) round up
otherwise, just drop the decimal

yes 1282  is the rounded answer.

teller · Answer

alright thank you

triciaal · Answer

|dw:1441571549092:dw|