Use ordinary interest:
$$\begin{array} { | l | l | l | l | l | l | l | }
\hline \text { Principal } & \text { Interest } & \text { Date } & \text { Date } & & \text { Simple } & \text { Amount } \
& \text { Rate } & \text { Borrowed } & \text { Repaid } & \text { Time } & \text { Interest } & \text { Paid Back } \
\hline \$ 12,000 & 9 \% & \text { Apr 5 } & \text { Aug } 9 & \text { A } & \text { B } & \text { C } \
\hline
\end{array}$$

Question

Use ordinary interest:
 $$\begin{array} { | l | l | l | l | l | l | l | } 
\hline \text { Principal } & \text { Interest } & \text { Date } & \text { Date } & & \text { Simple } & \text { Amount } \
& \text { Rate } & \text { Borrowed } & \text { Repaid } & \text { Time } & \text { Interest } & \text { Paid Back } \
\hline \$ 12,000 & 9 \% & \text { Apr 5 } & \text { Aug } 9 & \text { A } & \text { B } & \text { C } \
\hline
\end{array}$$

Quizplus · Accepted Answer

The Answer of Use ordinary interest:
 $$\begin{array} { | l | l | l | l | l | l | l | } 
\hline \text { Principal } & \text { Interest } & \text { Date } & \text { Date } & & \text { Simple } & \text { Amount } \
& \text { Rate } & \text { Borrowed } & \text { Repaid } & \text { Time } & \text { Interest } & \text { Paid Back } \
\hline \$ 12,000 & 9 \% & \text { Apr 5 } & \text { Aug } 9 & \text { A } & \text { B } & \text { C } \
\hline
\end{array}$$

Use Ordinary Interest