$12.$Calculate the missing value:

Principal Interest

$($$$)$ rate $(\%)$ Time Maturity Value $($$$)$

$?10(1)/(2)\%23$ days $$785\mathrm{.}16$

Answer

$13.$Calculate the missing value:

Principal Interest

$($$$)$ rate $(\%)$ Time Maturity Value $($$$)$

$$680?300$ days $$730\mathrm{.}30$

Answer

$16.$ Calculate the missing value:

Nominal CompoundingPeriodic

Interest rate $(\%)$ frequency interest rate $(\%)$

$9\%$ Quarterly $?$

Answer

$17.$ Calculate the missing value:

Nominal Compounding Periodic

Interest rate $(\%)$ frequency interest rate $(\%)$

$6\mathrm{.}5?1\mathrm{.}625$