Answer:
The rate of exchange for the £ is US$ 4
Step-by-step explanation:
1. Let's check the information provided to answer the question correctly:
Amount the U.S. citizen want to buy in £ = 25,000
Amount the U.S. citizen will pay in US$ = 100,000
2. Let's calculate the rate of exchange for the British pound £, this way:
Rate of exchange = Amount in US$/Amount in £
Rate of exchange = 100,000/25,000
Rate of exchange = 4 US$ per £
We can also express the rate for the US$, this way:
Rate of exchange = Amount in £/Amount in US$
Rate of exchange =25,000/100,000
Rate of exchange = £ 0.25 per US$