Vince borrows $900 to buy a couch. He will pay off the loan by paying 1.5% simple interest for 2 years. Vince incorrectly calculates the amount he will pay back using the expression below. 900 + 900(1.015 • 2) What is the correct amount Vince will pay back altogether? Explain the error in Vince’s expression.
Question
Answer:
[tex]\bf ~~~~~~ \textit{Simple Interest Earned Amount}\\\\
A=P(1+rt)\qquad
\begin{cases}
A=\textit{accumulated amount}\\
P=\textit{original amount deposited}\to& \$900\\
r=rate\to 1.5\%\to \frac{1.5}{100}\to &0.015\\
t=years\to &2
\end{cases}
\\\\\\
A=900(1+0.015\cdot 2)\implies A=\stackrel{\stackrel{recall}{\mathbb{PEMDAS}}}{900(1+0.03)}\implies A=900(1.03)[/tex]
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10 months ago
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