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anyanavicka [17]
3 years ago
11

After 7 years, Amber earned $1575 in simple interest from a cd into which he initially deposited $6000. What was the annual inte

rest rate
Mathematics
1 answer:
ankoles [38]3 years ago
4 0
\bf ~~~~~~ \textit{Simple Interest Earned}
\\\\
I = Prt\qquad 
\begin{cases}
I=\textit{interest earned}\to &\$1575\\
P=\textit{original amount deposited}\to& \$6000\\
r=rate\to r\%\to \frac{r}{100}\\
t=years\to &7
\end{cases}
\\\\\\
1575=(6000)(r)(7)\implies \cfrac{1575}{(6000)(7)}=r\implies 0.0375=r
\\\\\\
r\%=0.0375\cdot 100\implies r=\stackrel{\%}{3.75}
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