Determine a) whether the earlier or later payment has the greater economic value at the given interest rate and b) the interest rate at which the two payments would be equivalent:

If the ¥ per A$ exchange rate increases by ¥1 from its value ¥1.00 = A$ = 81.16, what will be the change in the A$ per ¥ exchange rate?

A savings account pays interest of 1.5% simple interest. Interest is calculated on the daily closing balance and paid at the close of business on the last day of the month. A depositor had a $2,239 opening balance on September 1, deposited $734 on September 7 and $627 on September 21, and withdrew $300 on both September 10 and September 21. What interest will be credited to the account at the month's end?

Calculate the price of a $25,000, 91-day Province of British Columbia Treasury bill on its issue date if the current market rate of return is 3.672% simple interest.