## Related questions with answers

Investigate the difference between compounding annually and simple interest. Round to the nearest cent. Find the interest for a 6-year CD for $5,000 at an interest rate of 2%, compounded annually.

Solution

VerifiedWe have to Find the interest for a 6-year CD for $5,000$ USD at an interest rate of $2\%$, compounded annually.First we have to calculate balans and then we calculate interest like a difference betwen balanse and principal. We calculate balanse using a equation,

$\begin{align*} B=P\left(1+\dfrac{r}{n}\right)^{n\cdot t} \end{align*}$

where is $P$ principal, $r$ is interest rate, $n$ is number of times interest is compounded annualy, $t$ is time in number of year. How is $5000$, $r=0.002$, $n=1$, and $t=6$, so we calculte,

$\begin{align*} B=5000\left(1+\dfrac{0.002}{1}\right)^{6}=5630.81\,\,\text{USD} \end{align*}$

And interest is,

$\begin{align*} I=B-P=5630.81-5000=630.81\,\,\text{USD} \end{align*}$

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