Hong received a $$25\mathrm{.}75$ gift card for a photo center. He used it to buy prints that cost $25$ cents each. The remaining balance, $B($in dollars$),$ on the card after

buying $x$ prints is given by the following function.

$B(x)=25\mathrm{.}75-0\mathrm{.}25x$

What is the remaining balance on the card if Hong bought $20$ prints?