The possible coordinates of y are 2 :)
The word domestic in GDP is the key to your answer. That means only income that was made in the United States (domestically) can be counted in the GDP.
The sentence you want to pay attention to is
GDP does not include income received by (sic) other countries. This sentence should read
GDP does not include income originating in other countries. No matter how it is written, that is the sentence you want which tells you what not to count.
You can only count income that originated in the United States.
The sentence you want is the last one of the first paragraph.
Remark
This may be a little confusing, but because they are travelling in opposite directions, the distances add when you want to get how far apart they are.
d1 + d2 = 1541
Equation
Let the time this happens = t
d1 = 323*t
d2 = 347*t
323*t + 347*t = 1541 Combine like terms on the left.
670t = 1541 Divide by 670
t = 1541/670
t = 2.3 hours pass before the distance of 1541 miles are between the two planes. You might need the answer to be 2 hours 18 minutes.
N - 2 x 8
n - 16
Therefore, n = 16
Hope this helps!! :))