5-12: Effective Rate of Interest Find the interest rates earned on each of the following:

You borrow $700 and promise to pay back $749 at the end of 1 year.

You lend $700 and the borrower promises to pay you $749 at the end of 1 year.

You borrow $85,000 and promise to pay back $201, 229 at the end of 10 years.

You borrow $9,000 and promise to make payments of $2, 684.80 at the end of each year for 5 years.