[tex]\bf \qquad \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad
\begin{cases}
A=\textit{compounded amount}\to &\$1448.44\\
P=\textit{original amount deposited}\to &\$1000\\
r=rate\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
\textit{semi-annually, thus twice}
\end{array}\to &2\\
t=years\to &4
\end{cases}[/tex]
solve for "r", now, the value you'd get, is a decimal format of it, thus, just multiply it by 100 to get the percent in % form
