On a backpacking trip through europe, troy spent 20 swiss francs to stay one night in a youth hostel. if the foreign exchange rate between the u. s. dollar and the swiss franc is 1: 2.2, how much did troy spend in u. s. dollars?

Step-by-step explanation:

Given: The amount spent by Troy to stay one night in a youth hostel= 20 Swiss francs

The foreign exchange rate between the U.S. dollar and the Swiss franc is 1:2.2

It means 1 US dollar = 2.2 Swiss francs

Thus, 1 Swiss francs = US dollar

Therefore, the amount spent by Troy to stay one night in a youth hostel (in US dollars)=

4th option is correct xy=-10

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