3 years ago

Please help me on the question on the bottom

Mathematics

2 answers:

Mashcka [7]3 years ago

7 0

The answer is 4. Hope this helps you!

ratelena [41]3 years ago

4 0

Answer: 4

Step -by-step :
7+7+7=21
5+12+a=
17+a
21-17=4

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3 years ago

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$\bf ~~~~~~ \textit{Compound Interest Earned Amount}
\\\\
A=P\left(1+\frac{r}{n}\right)^{nt}
\quad 
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to &\$500\\
r=rate\to 7\%\to \frac{7}{100}\to &0.07\\
n=
\begin{array}{llll}
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\textit{quarterly, thus four}
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t=years\to &1
\end{cases}
\\\\\\
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