The widths (in meters) of a kidney-shaped swimming pool were measured at 5-meter intervals as indicated in the figure. Use the Midpoint Rule with n = 4 to estimate the area S of the pool if a1 = 6.2, a2 = 7.2, a3 = 6.8, a4 = 5.6, a5 = 5, a6 = 4.8, and a7 = 4.8. m2 a, a a, a a, a, а,

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### Estimating the Area of a Kidney-Shaped Swimming Pool

**Formula for Midpoint Rule:**

\[ S \approx \Delta x \left( \frac{f(x_0) + f(x_1)}{2} + \frac{f(x_1) + f(x_2)}{2} + \cdots + \frac{f(x_{n-1}) + f(x_n)}{2} \right) \]

Here is an illustration of the kidney-shaped swimming pool:

![Kidney-shaped swimming pool diagram](image_url)

The widths (in meters) of a kidney-shaped swimming pool were measured at 5-meter intervals as indicated in the figure. Use the Midpoint Rule with \( n = 4 \) to estimate the area \( S \) of the pool if \( a_1 = 6.2 \), \( a_2 = 7.2 \), \( a_3 = 6.8 \), \( a_4 = 5.6 \), \( a_5 = 5 \), \( a_6 = 4.8 \), and \( a_7 = 4.8 \).

### Explanation of the Diagram:

In the provided diagram, a kidney-shaped swimming pool is shown with vertical measurements taken at 5-meter intervals. The measurements, denoted as \( a_1, a_2, \ldots, a_7 \), are given:

- \( a_1 = 6.2 \)
- \( a_2 = 7.2 \)
- \( a_3 = 6.8 \)
- \( a_4 = 5.6 \)
- \( a_5 = 5 \)
- \( a_6 = 4.8 \)
- \( a_7 = 4.8 \)

To estimate the area \( S \) of the pool, we use the Midpoint Rule with \( n = 4 \).

1. Divide the length of the pool into \( n \) intervals of equal width (in this case, \( \Delta x = 10 \) meters since there are 4 intervals).
2. Use the given widths at these intervals to approximate the area.

### Calculation Using Midpoint Rule:
- Midpoints for width calculation:
    - Midpoint between \( a_1 \) and \( a_2 \): \( \frac{6.2 +
Transcribed Image Text:### Estimating the Area of a Kidney-Shaped Swimming Pool **Formula for Midpoint Rule:** \[ S \approx \Delta x \left( \frac{f(x_0) + f(x_1)}{2} + \frac{f(x_1) + f(x_2)}{2} + \cdots + \frac{f(x_{n-1}) + f(x_n)}{2} \right) \] Here is an illustration of the kidney-shaped swimming pool: ![Kidney-shaped swimming pool diagram](image_url) The widths (in meters) of a kidney-shaped swimming pool were measured at 5-meter intervals as indicated in the figure. Use the Midpoint Rule with \( n = 4 \) to estimate the area \( S \) of the pool if \( a_1 = 6.2 \), \( a_2 = 7.2 \), \( a_3 = 6.8 \), \( a_4 = 5.6 \), \( a_5 = 5 \), \( a_6 = 4.8 \), and \( a_7 = 4.8 \). ### Explanation of the Diagram: In the provided diagram, a kidney-shaped swimming pool is shown with vertical measurements taken at 5-meter intervals. The measurements, denoted as \( a_1, a_2, \ldots, a_7 \), are given: - \( a_1 = 6.2 \) - \( a_2 = 7.2 \) - \( a_3 = 6.8 \) - \( a_4 = 5.6 \) - \( a_5 = 5 \) - \( a_6 = 4.8 \) - \( a_7 = 4.8 \) To estimate the area \( S \) of the pool, we use the Midpoint Rule with \( n = 4 \). 1. Divide the length of the pool into \( n \) intervals of equal width (in this case, \( \Delta x = 10 \) meters since there are 4 intervals). 2. Use the given widths at these intervals to approximate the area. ### Calculation Using Midpoint Rule: - Midpoints for width calculation: - Midpoint between \( a_1 \) and \( a_2 \): \( \frac{6.2 +
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