Suppose that the exchange rate is .60 dollars per swiss franc. if the franc appreciates 10% against the dollar how many francs would a dollar buy tomorrow?

1.5152

The ratio of the exchange rate of the dollar to Swiss franc is .60:1. It means that .60 dollar can buy 1 Swiss francs.  If the franc appreciates by 10% against a dollar by tomorrow, then the number of francs a dollar can buy is:

You need 10% more USD to buy one appreciated Swiss franc. 

The previous ratio is .60:1

When franc appreciates by 10% against the dollar, the ratio becomes (0.6+.10(,6):1 or .66:1

To get the number of francs (X) a dollar can now buy, we use the following equation

.66:1=1:X

.66X=1

X=1/.66

X= 1.515152 or 1.5152

answer; i believe the correct answer is (a) purchase of treasury stock;