Humphrey purchases a 100,000 home. Mortgage payments are to be made monthly for 30 years, with the first payment to be made one month from now. The annual effective rate of interest is 5 percent. After 10 years, the amount of each monthly payment is increased by 325.40 in order to repay the mortgage more quickly. Calculate the amount of interest paid over the duration of the loan. ADAPT note: The monthly payments after 10 years are still firm, not an increasing annuity.

S. you are changing planes in london for a flight to paris where you will connect with your flight to capetown. you are picking up reading material for the flight and are looking at the prices listed on the economist magazine which conveniently lists prices in several different global currencies. you note that the price in pounds is 2.40 pounds and the price in euros is 2 euros. the exchange rate for the dollar (your credit card was issued in the usa) is $1.59/pound and s1.3837/euro. should you buy reading materials now or wait until you're in paris?