What is the effective interest rate of a simple discount note for $31,200, at an ordinary bank discount rate of 14%, for 30 days? Assume that there are 360 days in a ye- The effective interest rate is %. (Round to the nearest tenth as needed.) CITE L

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**Understanding Effective Interest Rates for Simple Discount Notes**

This section will help you understand how to calculate the effective interest rate of a simple discount note. Let's look at a specific example.

**Problem Statement:**
What is the effective interest rate of a simple discount note for $31,200, at an ordinary bank discount rate of 14%, for 30 days? Assume that there are 360 days in a year.

---

**Solution:**

1. **Calculate the Bank Discount:**
   The bank discount is calculated using the formula:
   
   \[
   \text{Bank Discount} = \text{Face Value} \times \text{Discount Rate} \times \frac{\text{Time}}{360}
   \]
   
   Given:
   - Face Value (FV) = $31,200
   - Discount Rate (DR) = 14% = 0.14
   - Time (T) = 30 days
   
   \[
   \text{Bank Discount} = 31,200 \times 0.14 \times \frac{30}{360} = 31,200 \times 0.14 \times 0.0833 = \$364.32
   \]

2. **Determine the Proceeds (P):**
   The proceeds are calculated as the face value minus the bank discount.
   
   \[
   \text{Proceeds} = \text{Face Value} - \text{Bank Discount} = 31,200 - 364.32 = \$30,835.68
   \]

3. **Calculate the Effective Interest Rate (EIR):**
   The effective interest rate on the proceeds can be found using the simple interest formula:
   
   \[
   \text{Effective Interest Rate} = \frac{\text{Interest (Bank Discount)}}{\text{Proceeds}} \times \frac{360}{\text{Time}}
   \]
   
   Substituting the given values:
   
   \[
   \text{Effective Interest Rate} = \frac{364.32}{30,835.68} \times \frac{360}{30} = \frac{364.32}{30,835.68} \times 12 = 0.141992 \approx 14.2\%
   \]

Hence, the effective interest rate is approximately **14.2%**.

---
Feel free to use this example as a guide
Transcribed Image Text:**Understanding Effective Interest Rates for Simple Discount Notes** This section will help you understand how to calculate the effective interest rate of a simple discount note. Let's look at a specific example. **Problem Statement:** What is the effective interest rate of a simple discount note for $31,200, at an ordinary bank discount rate of 14%, for 30 days? Assume that there are 360 days in a year. --- **Solution:** 1. **Calculate the Bank Discount:** The bank discount is calculated using the formula: \[ \text{Bank Discount} = \text{Face Value} \times \text{Discount Rate} \times \frac{\text{Time}}{360} \] Given: - Face Value (FV) = $31,200 - Discount Rate (DR) = 14% = 0.14 - Time (T) = 30 days \[ \text{Bank Discount} = 31,200 \times 0.14 \times \frac{30}{360} = 31,200 \times 0.14 \times 0.0833 = \$364.32 \] 2. **Determine the Proceeds (P):** The proceeds are calculated as the face value minus the bank discount. \[ \text{Proceeds} = \text{Face Value} - \text{Bank Discount} = 31,200 - 364.32 = \$30,835.68 \] 3. **Calculate the Effective Interest Rate (EIR):** The effective interest rate on the proceeds can be found using the simple interest formula: \[ \text{Effective Interest Rate} = \frac{\text{Interest (Bank Discount)}}{\text{Proceeds}} \times \frac{360}{\text{Time}} \] Substituting the given values: \[ \text{Effective Interest Rate} = \frac{364.32}{30,835.68} \times \frac{360}{30} = \frac{364.32}{30,835.68} \times 12 = 0.141992 \approx 14.2\% \] Hence, the effective interest rate is approximately **14.2%**. --- Feel free to use this example as a guide
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