[tex]\bf ~~~~~~ \textit{Simple Interest Earned} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\dotfill & \$1250\\ r=rate\to 7.25\%\to \frac{7.25}{100}\dotfill &0.0725\\ t=years\dotfill &5 \end{cases} \\\\\\ I=(1250)(0.0725)(5)\implies 453.125 \\\\\\ \stackrel{\textit{he'll have to repay}}{1250+453.125}\implies 1703.125[/tex]