The dollar sterling exchange rate (colloquially known as ‘cable’) is 1.83, £1 = $1.83. the sterling euro exchange rate is 1.41, £1 = ¤1.41. the dollar euro exchange rate is 0.77, $1 = ¤0.77. is there an arbitrage, and if so, how does it work?

Mexico city, mexico, is the world's second largest metropolis and is also one of its fastest-growing cities with a projected growth rate of 3.2% per year. its population in 1991 was 20,899,000 people. use the formula p = 20.899e0.032t to predict its population p in millions with t equal to the number of years after 1991. what is the predicted population to the nearest thousand of mexico city for the year 2010?