Bianca has a choice between three savings accounts. savings account a has an apr of 3.9998%,
compounded semiannually; savings account b has an apr of 3.9742%, compounded monthly; and
savings account c has an apr of 3.9886%, compounded quarterly. bianca wants to choose the savings
account with the highest apy.
part i: if r is a savings account's apr and n is the number of compounding periods per year, what
expression gives the savings account's apy?