Answer:
US future value 108 dollars
Japan future value 90.18 dollars
Explanation:
For the US investment we simply apply the rate and we got the future value
100 x (1 + r) = 108 dollars in the future
For the Japanese investment wewill convert the 100 dollars into YEN
then we apply the rate and convert to the expected exchange rate:
100 US x 2.5 = 250 YEN
250 YEN x (1+1%) = 252.5 YEN (proceeds on YEN in one year)
252.5 / 2.8 = 90,1785714 = 90.18 dollars (final return after conversion)