Question

Number 13. Pls explain and give the answer

Answer 1

`\bf \qquad \textit{Simple Interest Earned by Mrs A}\\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\to& \$350\\ r=rate\to 4\%\to (4)/(100)\to &0.04\\ t=years\to &5 \end{cases} \\\\\\ I=350\cdot 0.04\cdot 5\implies \boxed{A=70}\\\\ -------------------------------\\\\`


`\bf \qquad \textit{Simple Interest Earned by Mrs B}\\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\to& \$500\\ r=rate\to 3.5\%\to (3.5)/(100)\to &0.035\\ t=years\to &5 \end{cases} \\\\\\ A=500\cdot 0.035\cdot 5\implies \boxed{A=87.5}\\\\ -------------------------------\\\\`


`\bf \qquad \textit{Simple Interest Earned by Mrs C}\\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\to& \$280\\ r=rate\to 4.25\%\to (4.25)/(100)\to &0.0425\\ t=years\to &5 \end{cases} \\\\\\ A=280\cdot 0.0425\cdot 5\implies \boxed{A=59.5}`

so, notice who made how much, so the order from least(smallest) to greatest(largest) will be C, A, B.