Question $4(2$ points$)$

What principal will have a future value of $$640,$ at $12\mathrm{.}1\%$ in $6$ months?

$a$ $$370\mathrm{.}80$

$b$ $$603\mathrm{.}50$

$c$ $$678\mathrm{.}72$

$d$ $$600$