Question

Number 13. Pls explain and give the answer

Answer 1

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

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

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

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